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LR-EDIT-OPTICS-PROFILE: Sony ARW distortion correction from the embedded table

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New vendor::arw_lens_rm6 reads the raw IFD's lens tables (0x7037 distortion,
0x7032 vignetting, 0x7035 lateral CA, their flags) and turns the distortion
table into a one-plane WarpRectilinear in OpcodeList3, with the conventions
measured on 54 ILCE-7RM6 photos: knots at i/15 of the full-frame crop half
diagonal, S(r) = r (1 + v(r)/15000), frame-filling zoom, centred on the
default crop. Only the ILCE-7RM6 is enabled; vignetting is read, not applied.
The radial least-squares fit is split out as vendor::fit_radial_warp (RW2
results unchanged); its error gate can be limited to the radii the crop
shows, so a padded active area (lossless files) doesn't refuse a fit over
pixels that are never rendered.

It sits next to main's vendor::arw_lens (#498), which holds the ILCE-7RM4A
conventions measured against Sony's exports (unit 16384, table indexed at the
output radius); the two are selected by camera model (disjoint allowlists).
arw::decode chains this module's opcodes after arw_lens::distortion, with the
same active area and the same crop (the DNG-style default crop when the file
has one, which on the ILCE-7RM6 equals Sony's crop tags), and like it only
for CFA data (not the downsized linear-RGB lossless sizes, where the knot
spacing in full-frame pixels would not hold).

The corpus test checks the conversion on the two lossless RawDB files (CC0).
The APS-C one is pinned in xtask RAW_SAMPLES with its sha256; the full-frame
one is not (at most two pins per PR, and #625 pins two Compressed ARW 6.0
files), so its case runs only where the file is present.

RENDER_CACHE_VERSION 62 -> 63.

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
dev-null-undefined
2026-10-13 13:09:40 +02:00
co-authored by Claude
parent 17a68863f6
commit 85cc4273be
7 changed files with 516 additions and 12 deletions
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xtask/src/main.rs
+7
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@@ -448,6 +448,13 @@ const RAW_SAMPLES: &[(&str, &str, &str)] = &[
"https://raw.pixls.us/data/Sony/DSLR-A900/_DSC7969.ARW",
"ac7c1532df77c321e8010aa1be60c1b9f245b1ac0db6f38fe617a73aae81af50",
),
// Sony ILCE-7RM6 lossless, CC0 1.0 (RawDB): the APS-C file, for its lens tables (`vendor::arw_lens_rm6`). The
// full-frame lossless file is not pinned (at most two pins per PR; #625 pins two Compressed ARW 6.0 files).
(
"arw-sony-ilce7rm6-apsc-land-lossless.arw",
"https://rawdb.dnglab.org/api/download/Sony/ILCE-7RM6/raw_modes/ILCE-7RM6_APSC_land_RAW.ARW",
"7aaf0b3941509d7364a6f03844783155ebc912d246d1c456e5cdb4693ec09fbc",
),
// CR2 colour-filter layouts differ by model (issue #85): CR2CFAPattern 3 (GBRG) and 1 (RGGB) samples
(
"cr2-canon-40d.cr2",