Signify Holding B.v.

Alexander Rosemann

Johan-Paul Marie Gerard Linnartz

Bianca Maria Irma Van Der Zande

Thijs Kruisselbrink

Rajendra Dangol

A method and computer device for determining a spatial luminance distribution over at least one image of a scene illuminated by at least one illuminant () are provided. The image comprises RGB channels. A linear combination of the RGB channels is applied to determine the luminance distribution. The linear combination has a set of coefficients comprising a respective coefficient for each of the RGB channels. The coefficients are determined by identifying a spectral power distribution, SPD, of the at least one illuminant and performing a search to determine values of the set of coefficients that minimise a spectral mismatch between: a) the identified SPD weighted by the linear combination; and b) the identified SPD weighted by a luminosity function.

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EINDHOVEN, Netherlands

Alexander Rosemann