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lensdb: lens distortion (poly3/poly5/PTLens), TCA (linear/poly3) and vignetting (pa) profiles, lensfun-format loader

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Profiles are interpolated in focal length (vignetting also in aperture and
focus distance), scaled by crop factor, and converted by least squares to the
DNG WarpRectilinear / FixVignetteRadial polynomials the pipeline already
applies. The lensfun database (CC-BY-SA) is only read from a directory the
user supplies; nothing is bundled.

Sources: lensfun's published database format and lens calibration
documentation (no lensfun code read), PanoTools wiki (a, b, c distortion
model), DNG specification 1.6 (WarpRectilinear, FixVignetteRadial);
interpolation and fitting: own design.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Andrew Frahn
2026-10-11 19:30:18 +11:00
co-authored by Claude Opus 5.5
parent 0ba118de92
commit 00ea386f7f
8 changed files with 1056 additions and 0 deletions
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Cargo.toml
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@@ -24,6 +24,7 @@ lightcraft-raw = { path = "crates/raw" }
lightcraft-codecs = { path = "crates/codecs" }
lightcraft-meta = { path = "crates/meta" }
lightcraft-develop = { path = "crates/develop" }
lightcraft-lensdb = { path = "crates/lensdb" }
lightcraft-scenes = { path = "crates/scenes" }
lightcraft-pipeline = { path = "crates/pipeline" }
lightcraft-gpu = { path = "crates/gpu" }