Patent ID: 7586525
Filing Date: 2009-09-08
Classification: H04N

Abstract:
1. A noise reduction apparatus comprising: a first digital noise removal device for inputting raw digital color image data representing an image in which each pixel of a number of pixels constituting one frame of an image has one color component from among a plurality of color components, the color components having distribution that is systematic, and removing uncorrelated noise of a noise-reduction target pixel, which includes the plurality of color components, within a zone around the noise-reduction target pixel, the zone being one having correlativity using a digital filter having filter coefficients which are calculated from statistics of the input raw digital color image data and statistics of a given uncorrelated noise; a color interpolation device for inputting the color image data from which uncorrelated noise has been removed by said first digital nose removal device, and executing color interpolation processing of the input color image data in such a manner that each pixel of the number of pixels constituting the one frame of the image will have all of the color components of the plurality of color components with the correlativity zone; and a second digital noise removal device for inputting the color image data that has been subjected to the color interpolation processing by said color interpolation device, and removing noise contained in the color image data that has been input by digital signal processing different from the noise-reduction of said first digital noise removal device.