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robmdunnandClaude Opus 5.5
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Nikon bodies from before ~2016 record no CropArea, so the decoder kept their whole sensor data, less trailing dark columns. Where that data holds masked lines above black or optical black, they were developed as a coloured or dark bar on that edge: the D7000 and D5100's 36 columns at ~600 (#976), the D800's 14 (#914, the top in portrait), and others. MEASURED_BODIES (crates/raw/src/vendor/nef.rs) now gives 36 model / data size / depth groups the frame of their camera JPEG inside the data: D7000, D5100, D800, D800E, Df, the D4's 12-bit mode, D3, D3S, D700, D300, D300S, D600, D610, D810, D4S, D5600, Coolpix A, D3000, D40X, D60, D80 and D2Xs. An entry matches model, data size and depth exactly; the measured white level becomes optional (only the D4's 14-bit mode has one). Bodies whose data holds only picture beyond the camera frame get no entry and render as before. `cargo xtask raw-frame FILE...` (crates/engine/examples/raw_frame.rs) measures a body: it aligns each raw's embedded camera JPEG with the sensor data (half-size luminance, gradient correlation, sub-pixel peak; weak, ambiguous or between-pixel peaks are flagged), counts the edge lines that hold no picture and reports what the decoder's crop keeps beyond the camera frame. It prints entries only with evidence: at least 3 clean files agreeing exactly, of the model (12- and 14-bit pooled) or, with at least one of its own, with sibling models of the same readout (data and JPEG size) that agree on the same frame. On the D7500, which records its CropArea, it finds that area exactly; it declines the Z f, whose JPEG is distortion-corrected. It works for any make whose raw embeds a full-size camera JPEG: on Sony, Canon CR2 / CR3, Pentax and Samsung files it finds the decoder's own crop (relative to the active area). docs/nikon-bodies.md surveys every Nikon raw on raw.pixls.us (98 models, 291 files; 138 CC0 samples measured): 22 models record CropArea; of the 88 groups without it, 36 have entries, 13 are fine, 25 could not be aligned and 7 do not decode. The D3200, D3100, D200, D50, D750 and Nikon 1 V1 / V2 are pending, each listed with the files it needs; the doc also describes how to add a body. raw-parity.md no longer claims every NEF coding but HE decodes. measured_bodies_are_consistent checks every entry lies inside its data and is listed once. The evidence is committed in docs/nikon-bodies/: headers.json (every file's raw size, depth and maker-note crop tags), samples.json (the 138 measured CC0 files with URL and sha256) and frames.jsonl (the tool's per-file results). `cargo xtask corpus --download nikon` fetches the samples (sha256 checked) so `cargo xtask raw-frame` reproduces every count. Fixes #976 Fixes #914 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>