Patent ID: 8942475
Filing Date: 2015-01-27
Classification: H04N

Abstract:
1. An image signal processing device comprising: a histogram detecting unit, configured to detect a luminance distribution of an image represented by an input luminance signal; a representative luminance calculating unit, configured to detect a representative luminance in a predetermined area of the image represented by the input luminance signal; a first luminance correction unit, configured to: a second luminance correction unit, configured to correct an output of the first luminance correction unit; a color difference correction unit, configured to correct a color difference signal according to a ratio of the input luminance signal and the output of the first luminance correction unit; and a control unit, configured to control a correction ratio of the first luminance correction unit and a correction ratio of the second luminance correction unit, based on an output of the histogram detecting unit, and configured to control a correction ratio of the color difference correction unit.