Image processing method and image processing device

Abstract

The present invention relates to an interpolation method and a filtering method which utilize a correlation between pixel signals, and it is an object of the present invention to provide a sharp and high-quality image even if an error occurs in correlation degree judgment. To accomplish the above-mentioned object, an imaging deviceis of a single-chip type, and includes a RGB Bayer pattern color filter, and an image is processed in a manner to be described below. Pixel signals outputted from the imaging deviceare inputted through a signal processing partto an image processing part. A correlation judgment partjudges a correlation between the pixel signals, and an interpolation processing partperforms a pixel interpolation process based on a correlation result. Thus, each pixel signal becomes a perfect signal having all R, G and B color components. Filter factors for a filterare determined based on the correlation result, and a filtering process is performed on the pixel signals subjected to the pixel interpolation. The filter factors are determined so as to assist the pixel interpolation process best.