Image processing apparatus, image pickup apparatus, storage medium for storing image processing program, and image processing method for reducing noise in RGB bayer array image data

摘要

An image processing apparatus including a noise reducing portion for applying noise reduction to RGB Bayer array image data for each of RGB channels with a noise reduction amount H, and calculating R_HG_HB_H Bayer array image data, and also applying the noise reduction to at least the G channel with a noise reduction amount L (LH), and calculating image data G_L; a color difference calculating portion for calculating color difference data (R_H−G_H) at a position of R_H and color difference data (B_H−G_H) at a position of B_H, based on the R_HG_HB_H Bayer array image data; and a band-limited interpolating portion and an RGB calculating portion for calculating R, G and B image data at respective pixel positions, based on the color difference data (R_H−G_H) and (B_H−G_H), and the image data G_L.