Gamma correction, image processing method and program, gamma correction circuit, image processing apparatus, and display apparatus

摘要

A gamma correction method including an inverse gamma correction process for inputting a value of a tone input signal Tin of X bits having non-linear tone-luminance characteristic and for outputting a tone signal Tout of Y bits (X<Y) having the tone-luminance characteristic converted to the linear characteristic, and a format conversion process for inputting the Tout and for outputting the tone output signal of (N+M) bits formed of a set of Tn and Tm which is nearest to the Tout when the Tout is expressed as A^TnxTm with a constant A, an index number indicated by the signal Tn of N bits and a mantissa indicated by the signal Tm of M bits.