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4 Commits
Author SHA1 Message Date
Brandon ThomasandClaude Opus 5.5 345f0454f2 M3.7: Sony ARW decoding (ARW2 cRAW, uncompressed, LJ92 tiles) 
ARW2 implemented from Dietz, EI 2016 (128-bit blocks, interleaved 16-pixel
sets, 7-bit scaled deltas, 5-segment tone curve from 0x7010); black/white/
WB/CFA/crop from the raw IFD's documented Sony tags. Verified visually on
A7 III / A7 IV samples; ~500-850 MP/s row-parallel decode.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-09-30 11:59:49 -04:00
Brandon ThomasandClaude Opus 5.5 741e93e632 M3.7: Canon CR2 decoding + rawinfo/rawrender examples 
IFD#3 lossless JPEG with 0xc640 slice reassembly, SensorInfo borders,
masked-column black levels per CFA position, saturation-plateau white,
as-shot WB from ColorBalance. Verified bit-identical to Adobe's DNG of
the same 5D Mark III frame. sRAW/mRAW reported as unsupported.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-09-30 11:43:46 -04:00
Brandon ThomasandClaude Opus 5.5 05450c791c M3.2-M3.6: lightcraft-raw DNG, LJ92, demosaic, highlights, DNG colour 
- LJ92 (T.81 process 14) decoder + Annex K encoder: predictors 1-7,
  1-4 components, 2-16 bit, point transform, restart intervals
- DNG: uncompressed (packed 1-16 bit, 16/24/32-bit float), LJ92 tiles/
  strips, Deflate with predictors 2/3/34892-34895; CFA + LinearRaw;
  linearization, BlackLevelRepeatDim/Delta, WhiteLevel, ActiveArea,
  DefaultCrop; colour tags; OpcodeList1-3 parse/write/apply
- DNG writer (uncompressed / LJ92 tiles) for export and round trips
- demosaic: bilinear, PPG, AHD (Hirakawa-Parks), X-Trans directional
- highlight clip/reconstruct; DNG colour model with dual illuminant,
  forward matrices, as-shot neutral -> xy, Rec.2020 transform
- embedded preview extraction; malformed-input proptests

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-09-30 11:33:19 -04:00
Brandon ThomasandClaude Opus 5.5 44d97a4104 M3.1: lightcraft-tiff reader/writer 
Classic + BigTIFF, both byte orders, all field types, SubIFDs and Exif/GPS/
Interop pointer IFDs, strips/tiles layout, maker-note offset-base helpers,
IFD writer; hardened against malformed input (proptests). Placeholder
manifests for lightcraft-meta and lightcraft-raw.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-09-30 11:00:48 -04:00