Abstract: An image compression method to compress image data generated through a pixel array includes categorizing image data corresponding to a plurality of sub-pixels arranged adjacent to each other and generating first color information for a first color pixel; determining a reference value as a criterion for compressing the image data based on pixel values of the sub-pixels; comparing the pixel values of the sub-pixels with the reference value; and outputting results of the comparisons and the reference value.

Abstract: A technique for determining noise is provided that suppresses misrecognition of significant components in an image as noise in any image captured under any condition. A noise determination apparatus for determining noise in image data that is input in units of frames decomposes the image data into frequency components, samples a predetermined number of data pieces for low-frequency components that have relatively low frequencies and a predetermined number of data pieces for high-frequency components that have relatively high frequencies from the frequency components, and analyzes whether or not the image data includes an edge image, on the basis of a ratio of high-frequency data to low-frequency data.