Patent ID: 8208038

Claim:
An image signal processing apparatus for outputting a luminance signal and color-difference signals of a predetermined output bit length on the basis of a captured image of a subject, the image signal processing apparatus comprising: image signal input means for inputting an image signal such that an image of the subject is captured; amplifying means for expanding a dynamic range of the input image signal; means for computing an RGB signal on the basis of the image signal in which the dynamic range is expanded; RGB γ correction means for performing RGB γ correction on an RGB signal and outputting the signal such that bits are expanded more than the output bit length; conversion means for computing a luminance signal and color-difference signals on the basis of the RGB signal such that bits are expanded by the RGB γ correction means; and non-linear correction means for performing non-linear correction so that a computed output level of the luminance signal is fit into the output bit length.