Image sensing apparatus and color-correction matrix correcting method and look-up table establishing method

摘要

An image sensing apparatus, a color-correction matrix correcting method and a look-up table establishing method are provided. The image sensing apparatus calculates a block statistics value corresponding to a block of pixels in an image sensor array. Based on a look-up table, the image sensing apparatus determines a covariance value corresponding to a current gain value. According to the covariance value and the block statistics value, the image sensing apparatus corrects a color-correction matrix corresponding to the block of pixels. The image sensing apparatus can use an amended color-correction matrix to correct the color of the pixel, so as to reduce chroma noise or other noise.

主权项

1. A color-correction matrix correcting method adapted to an image sensing apparatus, the method comprising:
calculating, by a color-correction circuit, a block statistics value corresponding to a block of pixels in an image sensor array; determining, by the color-correction circuit, a covariance value corresponding to a current gain value based on a look-up table; and correcting, by the color-correction circuit, a color-correction matrix corresponding to the block of pixels according to the covariance value and the block statistics value.