Patent ID: 7860339

Claim:
A visual processing device comprising: a spatial signal processing unit operable to output a processed signal generated by performing a predetermined processing on an input image signal based on information from a plurality of pixels surrounding a target pixel of the input image signal; and a visual processing unit operable to perform visual processing on the input image signal and operable to output an output signal as a result of the visual processing, the visual processing being performed using the input image signal and the processed signal output by the spacial signal processing unit, wherein the visual processing unit performs the visual processing, such that, within a predetermined input range of the input image signal and the processed signal, and with respect to a specific value of the input image signal, a corresponding value of the output signal decreases as a corresponding value of the processed signal increases, and wherein the visual processing unit performs the visual processing, such that, within the predetermined input range of the input image signal and the processed signal, and when a value of the input image signal and a value of the processed signal are a same value, a value of the output signal is obtained based on a concave function of the value of the input image signal.