Canon's SensorInfo left border is not where light starts: on every corpus
body 10-36 columns left of it already hold image (EOS 6D: masked columns
0-70, border 84), and the black level was averaged over all of them. The
6D read 2591 instead of 2047 (4 % of the range), so CR2s rendered dark with
crushed shadows; 40D +141, 5DS R +131, 5D Mark II +73. The masked run is
now measured from the data: columns whose mean stays within 1/256 of the
range of the leftmost columns', minus a two-column margin.
Against Lightroom Classic (EOS 6D still life, 2000 px, ΔE00): base 7.63 ->
5.23 (p95 24.7 -> 11.3); mean over 86 edit variants abs 9.13 -> 6.19,
effect 3.09 -> 2.75.
RENDER_CACHE_VERSION 23.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
High Efficiency NEFs (HE / HE★, Z 8, Z 9, Z 6III, Z f) keep compression
34713 but carry a JPEG XS-based codestream (SOC + CAP, FF10 FF50) and no
maker-note 0x0096 table. They fell through to "Nikon compressed NEF
without a linearization table", so the Preview only notice gave Z f users
no hint why their raw wasn't decoded or that Lossless compressed NEFs work.
Detect the codestream before asking for the table and report "Nikon High
Efficiency NEF" with the workaround. Add a synthetic regression test, CC0
Z f HE + Lossless samples to the corpus (raw.pixls.us) with a corpus test,
and list HE NEF among the format gaps in parity.md and ROADMAP.md.
No decoder: the format has no public specification and the existing
decoders (LibRaw, rawler) are LGPL and derived from Nikon's binaries.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011bbmJTxYJyYqKfNH8uXRC6
C5060WZ, C7070WZ, SP-510UZ, SP-550UZ, SP-565UZ and SP-570UZ files say
uncompressed 12-bit with many strips whose byte counts sum to exactly
width x height x 1.5. main refused them because the 12-bit branch wanted a
single strip, so they fell to "Olympus compressed ORF" and opened
preview-only. The samples are packed MSB-first, the strips hold two fields
(even output rows, then odd ones) with one gap at the seam, and the last row
of the second field sits right after the last strip. Accepted only when all of
that holds exactly. CFA comes from the Exif tag, white balance from maker-note
entries 0x1017/0x1018, black 0. RENDER_CACHE_VERSION 27 (adjust at merge).
The YCbCr M coding's pedestal is corrected separately (#535, item 3), so
this test no longer depends on which change lands first.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Three CC0 raw.pixls.us files of one ILCE-7CR (61 MP) scene: lossless
compressed L and M (subsampled YCbCr) and compressed ARW2. A raw corpus
test pins model, colour-filter layout, black level, white level, as-shot
gains and default crop, and checks that the lossless and compressed
mosaics agree inside the crop (green block correlation 0.9976). An engine
corpus test checks each gets a fitted camera look, not the neutral
fallback. All nine public codings decode and fit (mean dE76 1.59 against
their camera JPEGs).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
proxies() fitted the decoded camera JPEG into the sensor proxy's box,
which keeps the JPEG's own aspect and can round a pixel short: an
ILCE-7RM4's 1616x1080 preview, decoded at 384x257, fits a 192x128
profile proxy as 191x128, and collect_pairs rejected the mismatch. So
`lightcraft-cli calibrate` skipped every file from this camera and no
profile could be written.
Resize the JPEG to exactly the sensor proxy's size instead; proxies()
has already rejected references whose aspect differs by more than 2%.
Where fitting already landed on the proxy's size the result is
identical (fit is resize at a rounded size), so working renders don't
change: 34 real ILCE-7RM4 ARWs render bit-identically. On 923 files
from one trip calibrate goes from 0 to 843 accepted.
Refs #515
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
preset, background, resize, subfolder, conflict, tiffCompression and
dngCompression were in the export tool's schema (and so passed the new
argument check) but were dropped before reaching app.export.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Brandon Thomas