An image processing device includes a predominant color edge detection unit for detecting an edge using a predominant color signal which is a color signal with a highest appearance frequency from among plural color signals forming an input image signal, and a sub-color parameter calculation unit for calculating, with respect to a sub-color signal which is a color signal other than the predominant color signal in the plural color signals, from a pixel of interest and neighboring pixels of a same color as the pixel of interest, a sub-color parameter value related to a degree of isolated point of the pixel of interest. The image processing device further includes a sub-color isolated point correction unit for correcting the pixel of interest based on the sub-color parameter value and information of the detected edge.