Patent ID: 7659930

Claim:
An edge enhancement apparatus for Bayer images, comprising: a buffer for receiving and temporarily storing raw Bayer image data; a luminance characteristic value generating unit for reading the raw Bayer image data from the buffer, and generating luminance characteristic values for each interested pixel in accordance with all color signals of the raw Bayer image data, the interested pixel value and a plural of neighboring pixel values; an edge analyzing unit for receiving the luminance characteristic values, analyzing and determining if an edge characteristic and an edge orientation exist in the interested pixel in accordance with the luminance characteristic values of each interested pixel and a plural of neighboring pixels, wherein the edge analyzing unit further comprises a vertical edge matrix filter and a horizontal edge matrix filter for respectively calculating a vertical edge characteristic value and a horizontal edge characteristic value of each pixel; and an edge enhancement unit for receiving unenhanced image data, enhancing the pixel values in the edge orientation of the interested pixel if the edge characteristic exists in the interested pixel, and outputting edge-enhanced image data; wherein the luminance characteristic value generating unit comprises a matrix filter for generating the characteristic value of each pixel and a matrix implemented in the matrix filter is [ 1 2 1 2 4 2 1 2 1 ] ; ⁢ and wherein the edge analyzing unit determines that a vertical edge characteristic exists in the interested pixel when the vertical edge characteristic value is greater than a threshold value and the horizontal edge characteristic value.