Additive vs Multiplicative luminosity-color decomposition - Laboratoire de Psychologie et Neurocognition
Communication Dans Un Congrès Année : 2024

Additive vs Multiplicative luminosity-color decomposition

Additive vs multiplicative décomposition luminosité-couleur

David Alleysson
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Résumé

The visual system decomposes light entering the eye into an achromatic and a chromatic signal. Knowing whether this decomposition is additive or multiplicative is still a current research question. Luminance has been found to be additive when measured physiologically but multiplicative in appearance. Demosaicing multispectral images (shoot through a color or spectral filter array), show how additive decomposition is a linear solution to the inverse problem of mosaicing. But for reflectance estimation, a multiplicative decomposition would be preferred. Both decomposition imply two different geometries that share their vector spaces but not their metrics.
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Dates et versions

hal-04673832 , version 1 (20-08-2024)

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  • HAL Id : hal-04673832 , version 1

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David Alleysson. Additive vs Multiplicative luminosity-color decomposition. London Imaging Meeting 2024, Chacker Larabi; Michael Brown, Jun 2024, Londres, United Kingdom. ⟨hal-04673832⟩
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