Verified on 54 ILCE-7RM6 photos, the CA planes made the render worse: our
demosaic already hides about 70 % of the lens CA (the render shows 0.29x
the raw-CFA CA) while the post-demosaic warp moves R and B by 0.84x the
table, so the corner R/G and B/G CA went from rms 0.032 / max 0.125 px
(off) to 0.052 / 0.219 px (on) at 1440 px; only the 16-35 mm improved.
warp_opcode takes a lateral_ca flag; lens_opcodes passes false, so a Sony
ARW gets the one-plane distortion warp. The CA conversion stays live and
tested (FF and APS-C examples, both lossless corpus files' tables). The
follow-up is to warp the CFA colour planes before demosaic. The doc,
tracker (docs/parity-checklist.md), docs/gaps.md, docs/raw-parity.md and
whats-new say distortion applied, CA parsed and off
by default, vignetting not applied; the one-plane default costs 24 -> 45 ms
in the sample stage at 1920 px (three planes: 112 ms).
Co-Authored-By: Claude <noreply@anthropic.com>
docs/sony-ilce7rm6-lens-corrections.md records the three Sony tables, the
measured conventions with their residuals, the conversion to
WarpRectilinear and its fit gate, the model allowlist and how to extend
it, the measurement method, the verification and the limits.
Verified locally on 54 ILCE-7RM6 photos with four lenses. The corrected
render lines up with the camera JPEG within 0.679 px at 1440 px at the
corners and edge midpoints of the 33 measurable photos shot with
in-camera correction on (up to 17.3 px uncorrected). The 13 controls show
the model's own shift. Every fit passes the 0.25 px gate (margin 0.075).
Lateral CA stays within 0.3 px, but applied after demosaic it raises the
render's corner CA (rms 0.032 -> 0.052 px); the doc and tracker say so.
Its "Two conventions" section sets these conventions next to the
ILCE-7RM4A's (vendor::arw_lens, docs/sony-lens-corrections.md, #498):
on the 34 measurable ILCE-7RM6 photos that formula gives 1.429 / 0.319 px
(max / rms) against 0.596 / 0.143, failing only on the 24-70 GM II and
fitting the 100 mm and 200-600 better; no single unit fits every lens
under either, and what would settle it (Sony On/Off exports of a wide
zoom, more lenses). docs/sony-lens-corrections.md gains a pointer to it.
Tracker rows LR-EDIT-OPTICS-PROFILE (one note for both bodies) and
LR-IMP-CAMERA-COVERAGE in docs/parity-checklist.md, gap 8 in
docs/gaps.md, the lens-profile section of docs/raw-parity.md (lens score
unchanged), whats-new (lossless ARWs now; Compressed / Compressed HQ once
the ARW 6.0 decoder, #625, lands) and the colour-fit follow-up note are
updated.
Co-Authored-By: Claude <noreply@anthropic.com>
