Patent ID: 8421818
Filing Date: 2013-04-16
Classification: G06T,G09G,H04N

Abstract:
1. A signal processing device configured to convert an image input signal into an image output signal and to output the image output signal to a display device, the signal processing device comprising: a color-coordinate adjustment unit configured to perform color-coordinate adjustment processing of adjusting color coordinates of the image input signal, according to a color reproduction range of the display device; a lightness adjustment unit configured to perform lightness adjustment processing of adjusting a lightness component of the image input signal; an output signal generator configured to generate the image output signal based on the color coordinates adjusted by the color-coordinate adjustment processing and the lightness component adjusted by the lightness adjustment processing; a controller configured to control a color-coordinate contribution rate and a lightness component contribution rate based on a saturation of the image input signal, the color-coordinate contribution rate being a rate of contribution given to the image output signal by the color-coordinate adjustment processing, the lightness component contribution rate being a rate of contribution given to the image output signal by the lightness adjustment processing, wherein when the saturation of the image input signal is higher than a predetermined threshold in a specific hue, the controller increases the color-coordinate adjustment contribution rate while decreasing the lightness component contribution rate; and an acquisition unit configured to acquire a hue of each of pixels forming an image based on the image input signal, wherein as the hue acquired by the acquisition unit becomes closer to the specific hue, the controller increases the color-coordinate adjustment contribution rate while decreasing the lightness component contribution rate.