FA-79121 / Image orientation metadata / Open access

Baking writes null dimension tags for a lone width · case 01

Files that recorded only PixelXDimension gain a null PixelXDimension and a moved width.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The swap writes both keys unconditionally, inserting None for the missing partner.

VERIFIED REPAIR

Pop both keys and write each value only if it existed, under its partner name.

Unsuccessful approach: Restoring only complete pairs deletes a lone dimension tag entirely.

Case contract

After pixels have been baked upright, rewrite the metadata dictionary. When the (valid) Orientation is 5..8, exchange PixelXDimension/PixelYDimension, ImageWidth/ImageLength and XResolution/YResolution, moving a lone member of a pair to its partner key. Invalid or missing Orientation values mean no swap. Orientation is set to 1 only if the key exists; XMP:Orientation, if present, becomes the string "1"; ThumbOrientation is removed because the thumbnail is regenerated. Return sorted [key, value] pairs.

Why this case matters

Camera, phone and scanner images carry an orientation hint separately from the stored pixels; galleries, thumbnailers, editors and upload pipelines must interpret it consistently or photos appear sideways, mirrored or doubly rotated.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(meta):
    m = dict(meta)
    t = m.get('Orientation', 1)
    if t not in (1, 2, 3, 4, 5, 6, 7, 8):
        t = 1
    if t >= 5:
        for a, b in (('PixelXDimension', 'PixelYDimension'), ('ImageWidth', 'ImageLength'), ('XResolution', 'YResolution')):
            m[a], m[b] = m.get(b), m.get(a)
    if 'Orientation' in m:
        m['Orientation'] = 1
    if 'XMP:Orientation' in m:
        m['XMP:Orientation'] = '1'
    m.pop('ThumbOrientation', None)
    return [[k, m[k]] for k in sorted(m)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[[{'Orientation': 5, 'PixelXDimension': 3085, 'PixelYDimension': 271, 'XResolution': 264, 'YResolution': 241, 'XMP:Orientation': '1', 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]], [{'Orientation': 8, 'PixelXDimension': 3494, 'PixelYDimension': 3689, 'ImageLength': 3230, 'XResolution': 115, 'XMP:Orientation': '6', 'ThumbOrientation': 1, 'Make': 'Acme'}, [['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]], [{'Orientation': 6, 'PixelYDimension': 2215, 'ImageWidth': 3631, 'YResolution': 135, 'XMP:Orientation': '6'}, [['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]], [{'Orientation': 2, 'PixelXDimension': 3483, 'PixelYDimension': 682, 'ImageWidth': 1196, 'ImageLength': 620, 'XMP:Orientation': '6', 'ThumbOrientation': 6}, [['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]], [{'PixelXDimension': 3713, 'PixelYDimension': 3107, 'ImageWidth': 3378, 'ImageLength': 411, 'YResolution': 121}, [['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]], [{'PixelXDimension': 3102, 'PixelYDimension': 263, 'ImageWidth': 1654, 'ImageLength': 2684}, [['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]], [{'Orientation': 0, 'ImageWidth': 4760, 'ImageLength': 4173, 'XResolution': 182, 'Make': 'Acme'}, [['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]], [{'Orientation': 7, 'PixelXDimension': 2873, 'PixelYDimension': 1191, 'ImageWidth': 2585, 'ImageLength': 4554}, [['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]]], [[{'Orientation': 6, 'ImageWidth': 3998, 'XResolution': 106, 'YResolution': 377, 'ThumbOrientation': 1}, [['ImageLength', 3998], ['Orientation', 1], ['XResolution', 377], ['YResolution', 106]]], [{'Orientation': 6, 'PixelYDimension': 359, 'ImageWidth': 4056, 'ImageLength': 4624, 'XResolution': 104, 'YResolution': 235, 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 4056], ['ImageWidth', 4624], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 359], ['XResolution', 235], ['YResolution', 104]]], [{'PixelXDimension': 611, 'PixelYDimension': 1679, 'ImageWidth': 4933, 'ImageLength': 565, 'XMP:Orientation': '1', 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 565], ['ImageWidth', 4933], ['Make', 'Acme'], ['PixelXDimension', 611], ['PixelYDimension', 1679], ['XMP:Orientation', '1']]], [{'Orientation': 0, 'PixelYDimension': 4669, 'ImageWidth': 1458, 'ImageLength': 3813, 'XResolution': 143, 'YResolution': 303}, [['ImageLength', 3813], ['ImageWidth', 1458], ['Orientation', 1], ['PixelYDimension', 4669], ['XResolution', 143], ['YResolution', 303]]], [{'Orientation': 9, 'PixelXDimension': 1450, 'PixelYDimension': 714, 'ImageWidth': 3388, 'ImageLength': 3368, 'YResolution': 224, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 3368], ['ImageWidth', 3388], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 1450], ['PixelYDimension', 714], ['YResolution', 224]]], [{'PixelXDimension': 2501, 'ImageWidth': 4285, 'ImageLength': 4215, 'XResolution': 212, 'YResolution': 316, 'XMP:Orientation': '1', 'ThumbOrientation': 8}, [['ImageLength', 4215], ['ImageWidth', 4285], ['PixelXDimension', 2501], ['XMP:Orientation', '1'], ['XResolution', 212], ['YResolution', 316]]], [{'Orientation': 1, 'PixelXDimension': 2816, 'PixelYDimension': 2864, 'ImageWidth': 461, 'ImageLength': 2237, 'XResolution': 277, 'YResolution': 373, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 2237], ['ImageWidth', 461], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2816], ['PixelYDimension', 2864], ['XResolution', 277], ['YResolution', 373]]], [{'Orientation': 8, 'PixelXDimension': 2357, 'ImageWidth': 4348, 'ImageLength': 2027, 'XResolution': 114, 'XMP:Orientation': '3', 'Make': 'Acme'}, [['ImageLength', 4348], ['ImageWidth', 2027], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 2357], ['XMP:Orientation', '1'], ['YResolution', 114]]]], [[{'Orientation': 6, 'PixelYDimension': 2320, 'ImageWidth': 4268, 'ImageLength': 4198, 'XResolution': 376, 'YResolution': 302, 'ThumbOrientation': 1}, [['ImageLength', 4268], ['ImageWidth', 4198], ['Orientation', 1], ['PixelXDimension', 2320], ['XResolution', 302], ['YResolution', 376]]], [{'Orientation': 6, 'PixelXDimension': 1678, 'PixelYDimension': 2248, 'ImageWidth': 1422, 'ImageLength': 2871, 'YResolution': 243, 'XMP:Orientation': '1'}, [['ImageLength', 1422], ['ImageWidth', 2871], ['Orientation', 1], ['PixelXDimension', 2248], ['PixelYDimension', 1678], ['XMP:Orientation', '1'], ['XResolution', 243]]], [{'Orientation': 6, 'PixelXDimension': 1839, 'ImageWidth': 3327, 'ImageLength': 2385, 'YResolution': 260, 'ThumbOrientation': 8}, [['ImageLength', 3327], ['ImageWidth', 2385], ['Orientation', 1], ['PixelYDimension', 1839], ['XResolution', 260]]], [{'Orientation': 1, 'PixelYDimension': 4637, 'ImageWidth': 844, 'ImageLength': 4281, 'XResolution': 123, 'XMP:Orientation': '1'}, [['ImageLength', 4281], ['ImageWidth', 844], ['Orientation', 1], ['PixelYDimension', 4637], ['XMP:Orientation', '1'], ['XResolution', 123]]], [{'Orientation': 9, 'PixelXDimension': 2099, 'PixelYDimension': 2710, 'XResolution': 330, 'YResolution': 270, 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2099], ['PixelYDimension', 2710], ['XResolution', 330], ['YResolution', 270]]], [{'Orientation': 4, 'PixelYDimension': 2321, 'ImageWidth': 1769, 'XResolution': 96, 'YResolution': 275, 'XMP:Orientation': '3'}, [['ImageWidth', 1769], ['Orientation', 1], ['PixelYDimension', 2321], ['XMP:Orientation', '1'], ['XResolution', 96], ['YResolution', 275]]], [{'Orientation': 0, 'PixelXDimension': 3801, 'PixelYDimension': 833, 'ImageWidth': 655, 'ImageLength': 2578, 'XResolution': 340}, [['ImageLength', 2578], ['ImageWidth', 655], ['Orientation', 1], ['PixelXDimension', 3801], ['PixelYDimension', 833], ['XResolution', 340]]], [{'Orientation': 8, 'PixelXDimension': 4471, 'PixelYDimension': 854, 'ImageWidth': 4083, 'ImageLength': 2109}, [['ImageLength', 4083], ['ImageWidth', 2109], ['Orientation', 1], ['PixelXDimension', 854], ['PixelYDimension', 4471]]]], [[{'Orientation': 5, 'ImageWidth': 4453, 'ImageLength': 2889, 'XResolution': 346, 'YResolution': 99, 'Make': 'Acme'}, [['ImageLength', 4453], ['ImageWidth', 2889], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 99], ['YResolution', 346]]], [{'Orientation': 6, 'PixelXDimension': 3185, 'ImageWidth': 1218, 'XResolution': 140, 'YResolution': 141, 'Make': 'Acme'}, [['ImageLength', 1218], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 3185], ['XResolution', 141], ['YResolution', 140]]], [{'Orientation': 5, 'PixelXDimension': 4666, 'ImageLength': 4021, 'XResolution': 343, 'YResolution': 153, 'XMP:Orientation': '8', 'Make': 'Acme'}, [['ImageWidth', 4021], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 4666], ['XMP:Orientation', '1'], ['XResolution', 153], ['YResolution', 343]]], [{'Orientation': 2, 'PixelXDimension': 4921, 'PixelYDimension': 3995, 'ImageWidth': 1616, 'XResolution': 341, 'XMP:Orientation': '6'}, [['ImageWidth', 1616], ['Orientation', 1], ['PixelXDimension', 4921], ['PixelYDimension', 3995], ['XMP:Orientation', '1'], ['XResolution', 341]]], [{'PixelXDimension': 1405, 'PixelYDimension': 3697, 'ImageWidth': 3644, 'ImageLength': 3874, 'YResolution': 207, 'XMP:Orientation': '1'}, [['ImageLength', 3874], ['ImageWidth', 3644], ['PixelXDimension', 1405], ['PixelYDimension', 3697], ['XMP:Orientation', '1'], ['YResolution', 207]]], [{'Orientation': 3, 'PixelXDimension': 317, 'PixelYDimension': 1770, 'ImageWidth': 3506, 'XResolution': 328, 'YResolution': 264}, [['ImageWidth', 3506], ['Orientation', 1], ['PixelXDimension', 317], ['PixelYDimension', 1770], ['XResolution', 328], ['YResolution', 264]]], [{'Orientation': 1, 'PixelXDimension': 717, 'ImageWidth': 4963, 'ImageLength': 644, 'XResolution': 201, 'YResolution': 305, 'XMP:Orientation': '1'}, [['ImageLength', 644], ['ImageWidth', 4963], ['Orientation', 1], ['PixelXDimension', 717], ['XMP:Orientation', '1'], ['XResolution', 201], ['YResolution', 305]]], [{'Orientation': 8, 'ImageWidth': 4397, 'ImageLength': 4112, 'XResolution': 282, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 4397], ['ImageWidth', 4112], ['Make', 'Acme'], ['Orientation', 1], ['YResolution', 282]]]], [[{'Orientation': 8, 'PixelXDimension': 522, 'XResolution': 367, 'XMP:Orientation': '3'}, [['Orientation', 1], ['PixelYDimension', 522], ['XMP:Orientation', '1'], ['YResolution', 367]]], [{'Orientation': 8, 'PixelXDimension': 4024, 'PixelYDimension': 3617, 'ImageLength': 2606, 'XResolution': 247, 'XMP:Orientation': '8', 'ThumbOrientation': 1}, [['ImageWidth', 2606], ['Orientation', 1], ['PixelXDimension', 3617], ['PixelYDimension', 4024], ['XMP:Orientation', '1'], ['YResolution', 247]]], [{'Orientation': 1, 'XResolution': 149, 'YResolution': 285, 'XMP:Orientation': '3', 'ThumbOrientation': 1}, [['Orientation', 1], ['XMP:Orientation', '1'], ['XResolution', 149], ['YResolution', 285]]], [{'PixelXDimension': 385, 'ImageWidth': 1099, 'ImageLength': 3036, 'XMP:Orientation': '8', 'ThumbOrientation': 8}, [['ImageLength', 3036], ['ImageWidth', 1099], ['PixelXDimension', 385], ['XMP:Orientation', '1']]], [{'Orientation': 9, 'PixelXDimension': 4218, 'PixelYDimension': 1148, 'ImageWidth': 1525, 'XResolution': 171, 'YResolution': 311, 'XMP:Orientation': '6', 'Make': 'Acme'}, [['ImageWidth', 1525], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 4218], ['PixelYDimension', 1148], ['XMP:Orientation', '1'], ['XResolution', 171], ['YResolution', 311]]], [{'Orientation': 0, 'PixelXDimension': 1579, 'PixelYDimension': 2508, 'ImageWidth': 104, 'ImageLength': 3875, 'XResolution': 311, 'YResolution': 283, 'ThumbOrientation': 8}, [['ImageLength', 3875], ['ImageWidth', 104], ['Orientation', 1], ['PixelXDimension', 1579], ['PixelYDimension', 2508], ['XResolution', 311], ['YResolution', 283]]], [{'Orientation': 9, 'ImageWidth': 4790, 'ImageLength': 4004, 'XResolution': 219, 'YResolution': 340, 'Make': 'Acme'}, [['ImageLength', 4004], ['ImageWidth', 4790], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 219], ['YResolution', 340]]], [{'Orientation': 5, 'PixelXDimension': 2301, 'PixelYDimension': 1707, 'ImageWidth': 1166, 'ImageLength': 3560, 'XResolution': 383, 'ThumbOrientation': 8}, [['ImageLength', 1166], ['ImageWidth', 3560], ['Orientation', 1], ['PixelXDimension', 1707], ['PixelYDimension', 2301], ['YResolution', 383]]]]]
labels = ["regression: pair with a single member", "repair trap", "combined fault", "control", "control", "boundary", "boundary", "control"]
for i, (args, expected) in enumerate(fixtures[N-1]):
    check("%s %d" % (labels[i % len(labels)], i), solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
regression: pair with a single member 0	`[['ImageLength', None], ['ImageWidth', None], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	Failed
repair trap 1	`[['ImageLength', None], ['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['XResolution', None], ['YResolution', 115]]`	`[['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]`	Failed
combined fault 2	`[['ImageLength', 3631], ['ImageWidth', None], ['Orientation', 1], ['PixelXDimension', 2215], ['PixelYDimension', None], ['XMP:Orientation', '1'], ['XResolution', 135], ['YResolution', None]]`	`[['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]`	Failed
control 3	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	Passed
control 4	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	Passed
boundary 5	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	Passed
boundary 6	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	Passed
control 7	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873], ['XResolution', None], ['YResolution', None]]`	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]`	Failed

SHA-256 / d1d21c5a1b95daf5c9fed0c32419e4ca1c1ddd264d3249aaa4bcfde65a49a178

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(meta):
    m = dict(meta)
    t = m.get('Orientation', 1)
    if t not in (1, 2, 3, 4, 5, 6, 7, 8):
        t = 1
    if t >= 5:
        for a, b in (('PixelXDimension', 'PixelYDimension'), ('ImageWidth', 'ImageLength'), ('XResolution', 'YResolution')):
            va, vb = m.pop(a, None), m.pop(b, None)
            if va is not None and vb is not None:
                m[a], m[b] = vb, va
    if 'Orientation' in m:
        m['Orientation'] = 1
    if 'XMP:Orientation' in m:
        m['XMP:Orientation'] = '1'
    m.pop('ThumbOrientation', None)
    return [[k, m[k]] for k in sorted(m)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[[{'Orientation': 5, 'PixelXDimension': 3085, 'PixelYDimension': 271, 'XResolution': 264, 'YResolution': 241, 'XMP:Orientation': '1', 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]], [{'Orientation': 8, 'PixelXDimension': 3494, 'PixelYDimension': 3689, 'ImageLength': 3230, 'XResolution': 115, 'XMP:Orientation': '6', 'ThumbOrientation': 1, 'Make': 'Acme'}, [['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]], [{'Orientation': 6, 'PixelYDimension': 2215, 'ImageWidth': 3631, 'YResolution': 135, 'XMP:Orientation': '6'}, [['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]], [{'Orientation': 2, 'PixelXDimension': 3483, 'PixelYDimension': 682, 'ImageWidth': 1196, 'ImageLength': 620, 'XMP:Orientation': '6', 'ThumbOrientation': 6}, [['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]], [{'PixelXDimension': 3713, 'PixelYDimension': 3107, 'ImageWidth': 3378, 'ImageLength': 411, 'YResolution': 121}, [['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]], [{'PixelXDimension': 3102, 'PixelYDimension': 263, 'ImageWidth': 1654, 'ImageLength': 2684}, [['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]], [{'Orientation': 0, 'ImageWidth': 4760, 'ImageLength': 4173, 'XResolution': 182, 'Make': 'Acme'}, [['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]], [{'Orientation': 7, 'PixelXDimension': 2873, 'PixelYDimension': 1191, 'ImageWidth': 2585, 'ImageLength': 4554}, [['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]]], [[{'Orientation': 6, 'ImageWidth': 3998, 'XResolution': 106, 'YResolution': 377, 'ThumbOrientation': 1}, [['ImageLength', 3998], ['Orientation', 1], ['XResolution', 377], ['YResolution', 106]]], [{'Orientation': 6, 'PixelYDimension': 359, 'ImageWidth': 4056, 'ImageLength': 4624, 'XResolution': 104, 'YResolution': 235, 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 4056], ['ImageWidth', 4624], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 359], ['XResolution', 235], ['YResolution', 104]]], [{'PixelXDimension': 611, 'PixelYDimension': 1679, 'ImageWidth': 4933, 'ImageLength': 565, 'XMP:Orientation': '1', 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 565], ['ImageWidth', 4933], ['Make', 'Acme'], ['PixelXDimension', 611], ['PixelYDimension', 1679], ['XMP:Orientation', '1']]], [{'Orientation': 0, 'PixelYDimension': 4669, 'ImageWidth': 1458, 'ImageLength': 3813, 'XResolution': 143, 'YResolution': 303}, [['ImageLength', 3813], ['ImageWidth', 1458], ['Orientation', 1], ['PixelYDimension', 4669], ['XResolution', 143], ['YResolution', 303]]], [{'Orientation': 9, 'PixelXDimension': 1450, 'PixelYDimension': 714, 'ImageWidth': 3388, 'ImageLength': 3368, 'YResolution': 224, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 3368], ['ImageWidth', 3388], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 1450], ['PixelYDimension', 714], ['YResolution', 224]]], [{'PixelXDimension': 2501, 'ImageWidth': 4285, 'ImageLength': 4215, 'XResolution': 212, 'YResolution': 316, 'XMP:Orientation': '1', 'ThumbOrientation': 8}, [['ImageLength', 4215], ['ImageWidth', 4285], ['PixelXDimension', 2501], ['XMP:Orientation', '1'], ['XResolution', 212], ['YResolution', 316]]], [{'Orientation': 1, 'PixelXDimension': 2816, 'PixelYDimension': 2864, 'ImageWidth': 461, 'ImageLength': 2237, 'XResolution': 277, 'YResolution': 373, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 2237], ['ImageWidth', 461], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2816], ['PixelYDimension', 2864], ['XResolution', 277], ['YResolution', 373]]], [{'Orientation': 8, 'PixelXDimension': 2357, 'ImageWidth': 4348, 'ImageLength': 2027, 'XResolution': 114, 'XMP:Orientation': '3', 'Make': 'Acme'}, [['ImageLength', 4348], ['ImageWidth', 2027], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 2357], ['XMP:Orientation', '1'], ['YResolution', 114]]]], [[{'Orientation': 6, 'PixelYDimension': 2320, 'ImageWidth': 4268, 'ImageLength': 4198, 'XResolution': 376, 'YResolution': 302, 'ThumbOrientation': 1}, [['ImageLength', 4268], ['ImageWidth', 4198], ['Orientation', 1], ['PixelXDimension', 2320], ['XResolution', 302], ['YResolution', 376]]], [{'Orientation': 6, 'PixelXDimension': 1678, 'PixelYDimension': 2248, 'ImageWidth': 1422, 'ImageLength': 2871, 'YResolution': 243, 'XMP:Orientation': '1'}, [['ImageLength', 1422], ['ImageWidth', 2871], ['Orientation', 1], ['PixelXDimension', 2248], ['PixelYDimension', 1678], ['XMP:Orientation', '1'], ['XResolution', 243]]], [{'Orientation': 6, 'PixelXDimension': 1839, 'ImageWidth': 3327, 'ImageLength': 2385, 'YResolution': 260, 'ThumbOrientation': 8}, [['ImageLength', 3327], ['ImageWidth', 2385], ['Orientation', 1], ['PixelYDimension', 1839], ['XResolution', 260]]], [{'Orientation': 1, 'PixelYDimension': 4637, 'ImageWidth': 844, 'ImageLength': 4281, 'XResolution': 123, 'XMP:Orientation': '1'}, [['ImageLength', 4281], ['ImageWidth', 844], ['Orientation', 1], ['PixelYDimension', 4637], ['XMP:Orientation', '1'], ['XResolution', 123]]], [{'Orientation': 9, 'PixelXDimension': 2099, 'PixelYDimension': 2710, 'XResolution': 330, 'YResolution': 270, 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2099], ['PixelYDimension', 2710], ['XResolution', 330], ['YResolution', 270]]], [{'Orientation': 4, 'PixelYDimension': 2321, 'ImageWidth': 1769, 'XResolution': 96, 'YResolution': 275, 'XMP:Orientation': '3'}, [['ImageWidth', 1769], ['Orientation', 1], ['PixelYDimension', 2321], ['XMP:Orientation', '1'], ['XResolution', 96], ['YResolution', 275]]], [{'Orientation': 0, 'PixelXDimension': 3801, 'PixelYDimension': 833, 'ImageWidth': 655, 'ImageLength': 2578, 'XResolution': 340}, [['ImageLength', 2578], ['ImageWidth', 655], ['Orientation', 1], ['PixelXDimension', 3801], ['PixelYDimension', 833], ['XResolution', 340]]], [{'Orientation': 8, 'PixelXDimension': 4471, 'PixelYDimension': 854, 'ImageWidth': 4083, 'ImageLength': 2109}, [['ImageLength', 4083], ['ImageWidth', 2109], ['Orientation', 1], ['PixelXDimension', 854], ['PixelYDimension', 4471]]]], [[{'Orientation': 5, 'ImageWidth': 4453, 'ImageLength': 2889, 'XResolution': 346, 'YResolution': 99, 'Make': 'Acme'}, [['ImageLength', 4453], ['ImageWidth', 2889], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 99], ['YResolution', 346]]], [{'Orientation': 6, 'PixelXDimension': 3185, 'ImageWidth': 1218, 'XResolution': 140, 'YResolution': 141, 'Make': 'Acme'}, [['ImageLength', 1218], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 3185], ['XResolution', 141], ['YResolution', 140]]], [{'Orientation': 5, 'PixelXDimension': 4666, 'ImageLength': 4021, 'XResolution': 343, 'YResolution': 153, 'XMP:Orientation': '8', 'Make': 'Acme'}, [['ImageWidth', 4021], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 4666], ['XMP:Orientation', '1'], ['XResolution', 153], ['YResolution', 343]]], [{'Orientation': 2, 'PixelXDimension': 4921, 'PixelYDimension': 3995, 'ImageWidth': 1616, 'XResolution': 341, 'XMP:Orientation': '6'}, [['ImageWidth', 1616], ['Orientation', 1], ['PixelXDimension', 4921], ['PixelYDimension', 3995], ['XMP:Orientation', '1'], ['XResolution', 341]]], [{'PixelXDimension': 1405, 'PixelYDimension': 3697, 'ImageWidth': 3644, 'ImageLength': 3874, 'YResolution': 207, 'XMP:Orientation': '1'}, [['ImageLength', 3874], ['ImageWidth', 3644], ['PixelXDimension', 1405], ['PixelYDimension', 3697], ['XMP:Orientation', '1'], ['YResolution', 207]]], [{'Orientation': 3, 'PixelXDimension': 317, 'PixelYDimension': 1770, 'ImageWidth': 3506, 'XResolution': 328, 'YResolution': 264}, [['ImageWidth', 3506], ['Orientation', 1], ['PixelXDimension', 317], ['PixelYDimension', 1770], ['XResolution', 328], ['YResolution', 264]]], [{'Orientation': 1, 'PixelXDimension': 717, 'ImageWidth': 4963, 'ImageLength': 644, 'XResolution': 201, 'YResolution': 305, 'XMP:Orientation': '1'}, [['ImageLength', 644], ['ImageWidth', 4963], ['Orientation', 1], ['PixelXDimension', 717], ['XMP:Orientation', '1'], ['XResolution', 201], ['YResolution', 305]]], [{'Orientation': 8, 'ImageWidth': 4397, 'ImageLength': 4112, 'XResolution': 282, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 4397], ['ImageWidth', 4112], ['Make', 'Acme'], ['Orientation', 1], ['YResolution', 282]]]], [[{'Orientation': 8, 'PixelXDimension': 522, 'XResolution': 367, 'XMP:Orientation': '3'}, [['Orientation', 1], ['PixelYDimension', 522], ['XMP:Orientation', '1'], ['YResolution', 367]]], [{'Orientation': 8, 'PixelXDimension': 4024, 'PixelYDimension': 3617, 'ImageLength': 2606, 'XResolution': 247, 'XMP:Orientation': '8', 'ThumbOrientation': 1}, [['ImageWidth', 2606], ['Orientation', 1], ['PixelXDimension', 3617], ['PixelYDimension', 4024], ['XMP:Orientation', '1'], ['YResolution', 247]]], [{'Orientation': 1, 'XResolution': 149, 'YResolution': 285, 'XMP:Orientation': '3', 'ThumbOrientation': 1}, [['Orientation', 1], ['XMP:Orientation', '1'], ['XResolution', 149], ['YResolution', 285]]], [{'PixelXDimension': 385, 'ImageWidth': 1099, 'ImageLength': 3036, 'XMP:Orientation': '8', 'ThumbOrientation': 8}, [['ImageLength', 3036], ['ImageWidth', 1099], ['PixelXDimension', 385], ['XMP:Orientation', '1']]], [{'Orientation': 9, 'PixelXDimension': 4218, 'PixelYDimension': 1148, 'ImageWidth': 1525, 'XResolution': 171, 'YResolution': 311, 'XMP:Orientation': '6', 'Make': 'Acme'}, [['ImageWidth', 1525], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 4218], ['PixelYDimension', 1148], ['XMP:Orientation', '1'], ['XResolution', 171], ['YResolution', 311]]], [{'Orientation': 0, 'PixelXDimension': 1579, 'PixelYDimension': 2508, 'ImageWidth': 104, 'ImageLength': 3875, 'XResolution': 311, 'YResolution': 283, 'ThumbOrientation': 8}, [['ImageLength', 3875], ['ImageWidth', 104], ['Orientation', 1], ['PixelXDimension', 1579], ['PixelYDimension', 2508], ['XResolution', 311], ['YResolution', 283]]], [{'Orientation': 9, 'ImageWidth': 4790, 'ImageLength': 4004, 'XResolution': 219, 'YResolution': 340, 'Make': 'Acme'}, [['ImageLength', 4004], ['ImageWidth', 4790], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 219], ['YResolution', 340]]], [{'Orientation': 5, 'PixelXDimension': 2301, 'PixelYDimension': 1707, 'ImageWidth': 1166, 'ImageLength': 3560, 'XResolution': 383, 'ThumbOrientation': 8}, [['ImageLength', 1166], ['ImageWidth', 3560], ['Orientation', 1], ['PixelXDimension', 1707], ['PixelYDimension', 2301], ['YResolution', 383]]]]]
labels = ["regression: pair with a single member", "repair trap", "combined fault", "control", "control", "boundary", "boundary", "control"]
for i, (args, expected) in enumerate(fixtures[N-1]):
    check("%s %d" % (labels[i % len(labels)], i), solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
regression: pair with a single member 0	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	Passed
repair trap 1	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1']]`	`[['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]`	Failed
combined fault 2	`[['Orientation', 1], ['XMP:Orientation', '1']]`	`[['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]`	Failed
control 3	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	Passed
control 4	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	Passed
boundary 5	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	Passed
boundary 6	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	Passed
control 7	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]`	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]`	Passed

SHA-256 / 15586db72cbe3d542db34c576736cfa84e76e8851f95d2952b571a5a69129290

3 / The verified repair

Exit 0

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(meta):
    m = dict(meta)
    t = m.get('Orientation', 1)
    if t not in (1, 2, 3, 4, 5, 6, 7, 8):
        t = 1
    if t >= 5:
        for a, b in (('PixelXDimension', 'PixelYDimension'), ('ImageWidth', 'ImageLength'), ('XResolution', 'YResolution')):
            va, vb = m.pop(a, None), m.pop(b, None)
            if vb is not None:
                m[a] = vb
            if va is not None:
                m[b] = va
    if 'Orientation' in m:
        m['Orientation'] = 1
    if 'XMP:Orientation' in m:
        m['XMP:Orientation'] = '1'
    m.pop('ThumbOrientation', None)
    return [[k, m[k]] for k in sorted(m)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[[{'Orientation': 5, 'PixelXDimension': 3085, 'PixelYDimension': 271, 'XResolution': 264, 'YResolution': 241, 'XMP:Orientation': '1', 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]], [{'Orientation': 8, 'PixelXDimension': 3494, 'PixelYDimension': 3689, 'ImageLength': 3230, 'XResolution': 115, 'XMP:Orientation': '6', 'ThumbOrientation': 1, 'Make': 'Acme'}, [['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]], [{'Orientation': 6, 'PixelYDimension': 2215, 'ImageWidth': 3631, 'YResolution': 135, 'XMP:Orientation': '6'}, [['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]], [{'Orientation': 2, 'PixelXDimension': 3483, 'PixelYDimension': 682, 'ImageWidth': 1196, 'ImageLength': 620, 'XMP:Orientation': '6', 'ThumbOrientation': 6}, [['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]], [{'PixelXDimension': 3713, 'PixelYDimension': 3107, 'ImageWidth': 3378, 'ImageLength': 411, 'YResolution': 121}, [['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]], [{'PixelXDimension': 3102, 'PixelYDimension': 263, 'ImageWidth': 1654, 'ImageLength': 2684}, [['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]], [{'Orientation': 0, 'ImageWidth': 4760, 'ImageLength': 4173, 'XResolution': 182, 'Make': 'Acme'}, [['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]], [{'Orientation': 7, 'PixelXDimension': 2873, 'PixelYDimension': 1191, 'ImageWidth': 2585, 'ImageLength': 4554}, [['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]]], [[{'Orientation': 6, 'ImageWidth': 3998, 'XResolution': 106, 'YResolution': 377, 'ThumbOrientation': 1}, [['ImageLength', 3998], ['Orientation', 1], ['XResolution', 377], ['YResolution', 106]]], [{'Orientation': 6, 'PixelYDimension': 359, 'ImageWidth': 4056, 'ImageLength': 4624, 'XResolution': 104, 'YResolution': 235, 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 4056], ['ImageWidth', 4624], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 359], ['XResolution', 235], ['YResolution', 104]]], [{'PixelXDimension': 611, 'PixelYDimension': 1679, 'ImageWidth': 4933, 'ImageLength': 565, 'XMP:Orientation': '1', 'ThumbOrientation': 6, 'Make': 'Acme'}, [['ImageLength', 565], ['ImageWidth', 4933], ['Make', 'Acme'], ['PixelXDimension', 611], ['PixelYDimension', 1679], ['XMP:Orientation', '1']]], [{'Orientation': 0, 'PixelYDimension': 4669, 'ImageWidth': 1458, 'ImageLength': 3813, 'XResolution': 143, 'YResolution': 303}, [['ImageLength', 3813], ['ImageWidth', 1458], ['Orientation', 1], ['PixelYDimension', 4669], ['XResolution', 143], ['YResolution', 303]]], [{'Orientation': 9, 'PixelXDimension': 1450, 'PixelYDimension': 714, 'ImageWidth': 3388, 'ImageLength': 3368, 'YResolution': 224, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 3368], ['ImageWidth', 3388], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 1450], ['PixelYDimension', 714], ['YResolution', 224]]], [{'PixelXDimension': 2501, 'ImageWidth': 4285, 'ImageLength': 4215, 'XResolution': 212, 'YResolution': 316, 'XMP:Orientation': '1', 'ThumbOrientation': 8}, [['ImageLength', 4215], ['ImageWidth', 4285], ['PixelXDimension', 2501], ['XMP:Orientation', '1'], ['XResolution', 212], ['YResolution', 316]]], [{'Orientation': 1, 'PixelXDimension': 2816, 'PixelYDimension': 2864, 'ImageWidth': 461, 'ImageLength': 2237, 'XResolution': 277, 'YResolution': 373, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 2237], ['ImageWidth', 461], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2816], ['PixelYDimension', 2864], ['XResolution', 277], ['YResolution', 373]]], [{'Orientation': 8, 'PixelXDimension': 2357, 'ImageWidth': 4348, 'ImageLength': 2027, 'XResolution': 114, 'XMP:Orientation': '3', 'Make': 'Acme'}, [['ImageLength', 4348], ['ImageWidth', 2027], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 2357], ['XMP:Orientation', '1'], ['YResolution', 114]]]], [[{'Orientation': 6, 'PixelYDimension': 2320, 'ImageWidth': 4268, 'ImageLength': 4198, 'XResolution': 376, 'YResolution': 302, 'ThumbOrientation': 1}, [['ImageLength', 4268], ['ImageWidth', 4198], ['Orientation', 1], ['PixelXDimension', 2320], ['XResolution', 302], ['YResolution', 376]]], [{'Orientation': 6, 'PixelXDimension': 1678, 'PixelYDimension': 2248, 'ImageWidth': 1422, 'ImageLength': 2871, 'YResolution': 243, 'XMP:Orientation': '1'}, [['ImageLength', 1422], ['ImageWidth', 2871], ['Orientation', 1], ['PixelXDimension', 2248], ['PixelYDimension', 1678], ['XMP:Orientation', '1'], ['XResolution', 243]]], [{'Orientation': 6, 'PixelXDimension': 1839, 'ImageWidth': 3327, 'ImageLength': 2385, 'YResolution': 260, 'ThumbOrientation': 8}, [['ImageLength', 3327], ['ImageWidth', 2385], ['Orientation', 1], ['PixelYDimension', 1839], ['XResolution', 260]]], [{'Orientation': 1, 'PixelYDimension': 4637, 'ImageWidth': 844, 'ImageLength': 4281, 'XResolution': 123, 'XMP:Orientation': '1'}, [['ImageLength', 4281], ['ImageWidth', 844], ['Orientation', 1], ['PixelYDimension', 4637], ['XMP:Orientation', '1'], ['XResolution', 123]]], [{'Orientation': 9, 'PixelXDimension': 2099, 'PixelYDimension': 2710, 'XResolution': 330, 'YResolution': 270, 'Make': 'Acme'}, [['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 2099], ['PixelYDimension', 2710], ['XResolution', 330], ['YResolution', 270]]], [{'Orientation': 4, 'PixelYDimension': 2321, 'ImageWidth': 1769, 'XResolution': 96, 'YResolution': 275, 'XMP:Orientation': '3'}, [['ImageWidth', 1769], ['Orientation', 1], ['PixelYDimension', 2321], ['XMP:Orientation', '1'], ['XResolution', 96], ['YResolution', 275]]], [{'Orientation': 0, 'PixelXDimension': 3801, 'PixelYDimension': 833, 'ImageWidth': 655, 'ImageLength': 2578, 'XResolution': 340}, [['ImageLength', 2578], ['ImageWidth', 655], ['Orientation', 1], ['PixelXDimension', 3801], ['PixelYDimension', 833], ['XResolution', 340]]], [{'Orientation': 8, 'PixelXDimension': 4471, 'PixelYDimension': 854, 'ImageWidth': 4083, 'ImageLength': 2109}, [['ImageLength', 4083], ['ImageWidth', 2109], ['Orientation', 1], ['PixelXDimension', 854], ['PixelYDimension', 4471]]]], [[{'Orientation': 5, 'ImageWidth': 4453, 'ImageLength': 2889, 'XResolution': 346, 'YResolution': 99, 'Make': 'Acme'}, [['ImageLength', 4453], ['ImageWidth', 2889], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 99], ['YResolution', 346]]], [{'Orientation': 6, 'PixelXDimension': 3185, 'ImageWidth': 1218, 'XResolution': 140, 'YResolution': 141, 'Make': 'Acme'}, [['ImageLength', 1218], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 3185], ['XResolution', 141], ['YResolution', 140]]], [{'Orientation': 5, 'PixelXDimension': 4666, 'ImageLength': 4021, 'XResolution': 343, 'YResolution': 153, 'XMP:Orientation': '8', 'Make': 'Acme'}, [['ImageWidth', 4021], ['Make', 'Acme'], ['Orientation', 1], ['PixelYDimension', 4666], ['XMP:Orientation', '1'], ['XResolution', 153], ['YResolution', 343]]], [{'Orientation': 2, 'PixelXDimension': 4921, 'PixelYDimension': 3995, 'ImageWidth': 1616, 'XResolution': 341, 'XMP:Orientation': '6'}, [['ImageWidth', 1616], ['Orientation', 1], ['PixelXDimension', 4921], ['PixelYDimension', 3995], ['XMP:Orientation', '1'], ['XResolution', 341]]], [{'PixelXDimension': 1405, 'PixelYDimension': 3697, 'ImageWidth': 3644, 'ImageLength': 3874, 'YResolution': 207, 'XMP:Orientation': '1'}, [['ImageLength', 3874], ['ImageWidth', 3644], ['PixelXDimension', 1405], ['PixelYDimension', 3697], ['XMP:Orientation', '1'], ['YResolution', 207]]], [{'Orientation': 3, 'PixelXDimension': 317, 'PixelYDimension': 1770, 'ImageWidth': 3506, 'XResolution': 328, 'YResolution': 264}, [['ImageWidth', 3506], ['Orientation', 1], ['PixelXDimension', 317], ['PixelYDimension', 1770], ['XResolution', 328], ['YResolution', 264]]], [{'Orientation': 1, 'PixelXDimension': 717, 'ImageWidth': 4963, 'ImageLength': 644, 'XResolution': 201, 'YResolution': 305, 'XMP:Orientation': '1'}, [['ImageLength', 644], ['ImageWidth', 4963], ['Orientation', 1], ['PixelXDimension', 717], ['XMP:Orientation', '1'], ['XResolution', 201], ['YResolution', 305]]], [{'Orientation': 8, 'ImageWidth': 4397, 'ImageLength': 4112, 'XResolution': 282, 'ThumbOrientation': 8, 'Make': 'Acme'}, [['ImageLength', 4397], ['ImageWidth', 4112], ['Make', 'Acme'], ['Orientation', 1], ['YResolution', 282]]]], [[{'Orientation': 8, 'PixelXDimension': 522, 'XResolution': 367, 'XMP:Orientation': '3'}, [['Orientation', 1], ['PixelYDimension', 522], ['XMP:Orientation', '1'], ['YResolution', 367]]], [{'Orientation': 8, 'PixelXDimension': 4024, 'PixelYDimension': 3617, 'ImageLength': 2606, 'XResolution': 247, 'XMP:Orientation': '8', 'ThumbOrientation': 1}, [['ImageWidth', 2606], ['Orientation', 1], ['PixelXDimension', 3617], ['PixelYDimension', 4024], ['XMP:Orientation', '1'], ['YResolution', 247]]], [{'Orientation': 1, 'XResolution': 149, 'YResolution': 285, 'XMP:Orientation': '3', 'ThumbOrientation': 1}, [['Orientation', 1], ['XMP:Orientation', '1'], ['XResolution', 149], ['YResolution', 285]]], [{'PixelXDimension': 385, 'ImageWidth': 1099, 'ImageLength': 3036, 'XMP:Orientation': '8', 'ThumbOrientation': 8}, [['ImageLength', 3036], ['ImageWidth', 1099], ['PixelXDimension', 385], ['XMP:Orientation', '1']]], [{'Orientation': 9, 'PixelXDimension': 4218, 'PixelYDimension': 1148, 'ImageWidth': 1525, 'XResolution': 171, 'YResolution': 311, 'XMP:Orientation': '6', 'Make': 'Acme'}, [['ImageWidth', 1525], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 4218], ['PixelYDimension', 1148], ['XMP:Orientation', '1'], ['XResolution', 171], ['YResolution', 311]]], [{'Orientation': 0, 'PixelXDimension': 1579, 'PixelYDimension': 2508, 'ImageWidth': 104, 'ImageLength': 3875, 'XResolution': 311, 'YResolution': 283, 'ThumbOrientation': 8}, [['ImageLength', 3875], ['ImageWidth', 104], ['Orientation', 1], ['PixelXDimension', 1579], ['PixelYDimension', 2508], ['XResolution', 311], ['YResolution', 283]]], [{'Orientation': 9, 'ImageWidth': 4790, 'ImageLength': 4004, 'XResolution': 219, 'YResolution': 340, 'Make': 'Acme'}, [['ImageLength', 4004], ['ImageWidth', 4790], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 219], ['YResolution', 340]]], [{'Orientation': 5, 'PixelXDimension': 2301, 'PixelYDimension': 1707, 'ImageWidth': 1166, 'ImageLength': 3560, 'XResolution': 383, 'ThumbOrientation': 8}, [['ImageLength', 1166], ['ImageWidth', 3560], ['Orientation', 1], ['PixelXDimension', 1707], ['PixelYDimension', 2301], ['YResolution', 383]]]]]
labels = ["regression: pair with a single member", "repair trap", "combined fault", "control", "control", "boundary", "boundary", "control"]
for i, (args, expected) in enumerate(fixtures[N-1]):
    check("%s %d" % (labels[i % len(labels)], i), solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
regression: pair with a single member 0	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	`[['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 271], ['PixelYDimension', 3085], ['XMP:Orientation', '1'], ['XResolution', 241], ['YResolution', 264]]`	Passed
repair trap 1	`[['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]`	`[['ImageWidth', 3230], ['Make', 'Acme'], ['Orientation', 1], ['PixelXDimension', 3689], ['PixelYDimension', 3494], ['XMP:Orientation', '1'], ['YResolution', 115]]`	Passed
combined fault 2	`[['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]`	`[['ImageLength', 3631], ['Orientation', 1], ['PixelXDimension', 2215], ['XMP:Orientation', '1'], ['XResolution', 135]]`	Passed
control 3	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	`[['ImageLength', 620], ['ImageWidth', 1196], ['Orientation', 1], ['PixelXDimension', 3483], ['PixelYDimension', 682], ['XMP:Orientation', '1']]`	Passed
control 4	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	`[['ImageLength', 411], ['ImageWidth', 3378], ['PixelXDimension', 3713], ['PixelYDimension', 3107], ['YResolution', 121]]`	Passed
boundary 5	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	`[['ImageLength', 2684], ['ImageWidth', 1654], ['PixelXDimension', 3102], ['PixelYDimension', 263]]`	Passed
boundary 6	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	`[['ImageLength', 4173], ['ImageWidth', 4760], ['Make', 'Acme'], ['Orientation', 1], ['XResolution', 182]]`	Passed
control 7	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]`	`[['ImageLength', 2585], ['ImageWidth', 4554], ['Orientation', 1], ['PixelXDimension', 1191], ['PixelYDimension', 2873]]`	Passed

SHA-256 / e06ea9f1183ed715353f2ea9bf2e9fb9464dd2b5559585aa6612fc7e5d098452

Verification & scope

A deterministic bounded teaching model with a stipulated contract; it makes no claim of conformance to any published specification. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:49:41.765243+00:00.

Case digest / 0edf499a3786a76d4eeaed2e72124488e8bb62650c9c19618bcf027d6738cc78