spektrafilm by Andrea Volpato
https://github.com/andreavolpato/spektrafilm
Licensed CC BY-SA4.0
Derived GPU tables generated by Kolorshift from the spectral negative/print/scan model.
Photographs are not covered by this data license.

Kolorshift chart-derived models, 27 October 2026
Independent sensitometric/spectral reconstruction algorithms; no proprietary LensNode, Dehancer or Filmbox code, profiles or captures.
Manufacturer numerical H-D and sensitivity charts: Kodak, Ilford/Harman, Fujifilm, Foma, Agfa, CineStill and historical Polaroid. Source editions, URLs, axes, development conditions, hashes and modelling assumptions are retained in the accompanying manifests. Manufacturer PDF artwork and sample photographs are not distributed in this data package.
Rollei Retro80S H-D numerical measurements: Eginhard Teichmann, 26 April2010, Neofin Blau6min20C, ISO80, WallnerMC505; independent factual test, not manufacturer validation. Manufacturer spectral chart: Rollei2021. See rollei-measured-manifest.json.
Common print data used by the independent models: Kodak2302, KodakPortraEndura and FujicolorCrystalArchiveTypeII, from spektrafilm data0.3.3 by AndreaVolpato, CC BY-SA4.0. These derived numerical GPU tables retain the same data licence. The source spektrafilm Python implementation is not imported or distributed.
Build-time spectral reconstruction: Smits1999, colour-science (BSD3-Clause). No numerical reconstruction can uniquely recover a scene spectrum from an RGB image. These profiles have not been calibrated against individual phone cameras or validated as exact matches to physical film scans.


Historical snapshot, 27October2026 —44 active stock models of46. Added CineStill400D from its own dashed RGB sensitometric traces in the CineStill-published March2024 comparison; compared BrandH solid traces and numerical matrix are not used. Conditions not fully identified; this is an RGB sensitometric approximation, not a calibrated spectral response. See cinestill-extra-manifest.json.
Added LomographyColorNegative100/400/800 from three separately labelled photographs of the same colour chart in the manufacturer's January2022 guide. Each has its own24 numeric patch observations, six neutral channel curves and regularized colour matrix. The models reproduce the brochure scans, not intrinsic emulsion spectral response; illumination, scanning, exposure and lot are unknown. Raw numeric facts, source hashes, sampling and validation are in lomography-chart-manifest.json. Source photographs and PDF artwork are not distributed. Common print-data CC BY-SA requirements still apply where used. At that snapshot CineStill50D and PolaroidColorSX70 were pending with no substitute; their current independent interpretations are documented below.
Renderer16 retains the original-texel halation extraction and float32/uint16 RAW pipeline. Coma and fringing have expanded phone-visible ranges; they remain independent optical approximations, with exact zero bypass and no global coordinate pull. Physical lens correspondence, image quality, thermal behaviour and battery life still require real-device validation.

28 October 2026 — 46 active references: 44 models based on published data and two independent Kolorshift numerical interpretations, CineStill50D and PolaroidColorSX70. The latter use chosen, unmeasured response parameters; manufacturer pages document film identity, speed and process only. They are not physically calibrated or validated matches to an emulsion or scan. No neighbouring stock, proprietary profile or rejected experimental LUT is substituted. Details and original modelling licence: independent-manifest.json. Existing third-party data licences above remain unchanged.