1. A method of image processing comprising: acquiring image data generated by an image sensor; generating a hue histogram of the image data by a hue histogram generation unit; discriminating, by a scene discrimination control unit, whether an image of the image data is a vivid color scene based on a discrimination threshold that is set according to a number of hues of which frequency is larger than a predetermined threshold in the hue histogram; and outputting, by a scene discrimination unit, a discrimination result by comparing a chroma of the image data with the discrimination threshold.