Photo Colorization: Why PSNR 30 dB Is a Luminance Floor, Not a Color Guarantee

PSNR 30 dB can hide chroma errors in AI photo colorization; learn why luminance fidelity differs from color fidelity and how to verify with Lab chromaticity. Independent technical note mirroring the canonical version: https://colorizethis.io/blog/photo-colorization-why-psnr-30-db-is-a-luminance-floor-not-a-color-guarantee.php Sources consulted: https://www.bluusun.com/

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-10-27
DOI
https://doi.org/10.5281/zenodo.23718479
Primary Topic
Image and Video Quality Assessment
Type
preprint
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preprint

Photo Colorization: Why PSNR 30 dB Is a Luminance Floor, Not a Color Guarantee

Emily Patterson
Zenodo (CERN European Organization for Nuclear Research)
Image and Video Quality Assessment
preprint

Photo Colorization: Why PSNR 30 dB Is a Luminance Floor, Not a Color Guarantee

Emily Patterson
preprint en

Abstract

PSNR 30 dB can hide chroma errors in AI photo colorization; learn why luminance fidelity differs from color fidelity and how to verify with Lab chromaticity. Independent technical note mirroring the canonical version: https://colorizethis.io/blog/photo-colorization-why-psnr-30-db-is-a-luminance-floor-not-a-color-guarantee.php Sources consulted: https://www.bluusun.com/

Zenodo (CERN European Organization for Nuclear Research)
Image and Video Quality Assessment
DOIOpen Access PDFOpenAlex
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Photo Colorization: Why PSNR 30 dB Is a Luminance Floor, Not a Color Guarantee — Emily Patterson · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS