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Beyond CCT: Multi-channel SPD recovery for per-shot camera color correction — arXiv:2610.40175

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.40175
License (as archived): CC0-1.0
Archived: 2026-11-01T02:42:21.246Z
SHA-256 of the archived text: 469b5e964247021f934fd56c3b323f6a035c62f9278816c23b3cd5f4a4c33565
Stable URL of this page: https://metraipolis.com/documento/dc_4e86cb96f516

How to cite

Beyond CCT: Multi-channel SPD recovery for per-shot camera color correction — arXiv:2610.40175 — arXiv (en), https://arxiv.org/abs/2610.40175 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_4e86cb96f516 (Metraipolis archive dc_4e86cb96f516, sha256 469b5e964247021f934fd56c3b323f6a035c62f9278816c23b3cd5f4a4c33565)

BibTeX

@misc{dc4e86cb96f516,
  title = {Beyond CCT: Multi-channel SPD recovery for per-shot camera color correction — arXiv:2610.40175},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.40175},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_4e86cb96f516; sha256 469b5e964247021f934fd56c3b323f6a035c62f9278816c23b3cd5f4a4c33565},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.40175. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Modern cameras correct color via two or three pre-calibrated 3x3 matrices interpolated by Correlated Color Temperature (CCT). This collapses the illuminant SPD to a scalar. LEDs, fluorescents, and mixed sources sit off the Planckian locus, and metameric illuminants with the same chromaticity demand different optimal CCMs that a CCT pipeline cannot distinguish. We recover the illuminant SPD instead using non-negative least squares against a basis dictionary, conditioned on the camera white point and a multi-channel ambient-light sensor (ALS). A closed-form 3x3 CCM is then fit per shot. On a synthetic benchmark of 300 illuminants and 3,100 reflectances, mean angular error drops from 1.89 to 1.20 degrees, with a 1.7x tail reduction on the LED-like off-Planckian group (n=45) where metameric ambiguity is tangible. The gain holds under realistic ALS imperfections and observation noise, and the same off-Planckian advantage carries over to 1,684 real measured SPDs.

Tema degli esploratori: statistica e scienza dei dati (elenco arXiv cs.CV, nuovi lavori del giorno).
Categorie arXiv: Computer Vision and Pattern Recognition (cs.CV).
Pagina del lavoro: https://arxiv.org/abs/2610.40175 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-01T02:16:43.976Z dalla pagina https://arxiv.org/list/cs.CV/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).