Gradation correction device and image sensing device therewith.

摘要

A gradation correction device with a feature quantity extraction means (1105) for extracting feature quantities from input digital picture signals of a picture, which feature quantities reflecting luminace level distribution of the input digital picture signals; a gradation correction characteristic determination means (1106) for determining a gradation correction characteristic based on the feature quantities received from the feature quantity extraction means, which gradation correction characteristic defining an output signal for an input signal; and a correction means for correcting each of the input digital picture signals by using the gradation correction characteristic determined by the gradation correction characteristic determination means; whereby the gradation correction characteristic for the input picture digital signals is varied according to features thereof.