dtourolle/DarkRoom
1
0
Fork 0
Code Issues 39 Pull Requests Actions Packages Projects Releases 20 Wiki Activity

Keep the sigmoid as the default curve; Camera Raw's tone is a choice

Browse Source 
The Camera Raw default rested on comparing against Lightroom previews
of photographs that carry the user's Lightroom edits — HSL saturation
Blue +58, Aqua +50 and more, Highlights -40, Blacks -20, in every
DNG's XMP — so it measured the house look, not Camera Raw's base
rendering. Under the ACR3 curve _MG_9080 renders brighter than its
Lightroom preview (mean 0.39 against 0.31).

So the curve choice's first variant, the default, is the sigmoid again
and every raw renders as in 0.20.0 apart from baseline exposure. D21
and camera-profiles.md §12 now say the default is open, to be decided
by measuring against Lightroom exports of unedited photographs. Tests
that are about Camera Raw's tone choose it explicitly.
This commit is contained in:
dtourolle
2026-10-03 14:22:48 -04:00
parent 0730ef1016
commit 1e8594724e
7 changed files with 48 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/dev/camera-profiles.md
+6 -2
View File
@@ -295,8 +295,12 @@ that rendering, chosen by a new parameter on `view_transform`:
| `curve` | What it is | Default for |
|---|---|---|
| Camera Raw | the profile's curve, else ACR3, via RGBTone in ProPhoto | every raw (D21) |
| Sigmoid | D19's log-logistic curve | — |
| Sigmoid | D19's log-logistic curve | every raw, for now |
| Camera Raw | the profile's curve, else ACR3, via RGBTone in ProPhoto | — (D21: the default is open) |
*Amended 2026-10-03:* Camera Raw was the default in the first draft. The measurement it rested on
compared against Lightroom renders of *edited* photographs; see D21. The default is decided by
measuring against Lightroom exports of unedited ones.
A JPEG is still not rendered again (FR-DEV-3j). Film simulation still replaces the view transform
when a stock is chosen.