Patent ID: 8189947

Claim:
An image edge correction apparatus comprising: an edge information extraction unit for extracting edge information of an input image based on luminance change directivity information of the input image, wherein the edge information extraction unit comprises a luminance change directivity information extraction unit for selecting a predetermined pixel region from the input image, generating a region of interest by applying an average filter to the selected predetermined pixel region and extracting the luminance change directivity information with respect to a pixel of interest located in the center of the region of interest; and an edge enhancement unit for enhancing an edge of the input image by applying different luminance weights to a pixel of interest included in the input image based on the edge information of the input image, wherein the pixel of interest is located in a center of the region of interest, wherein the luminance change directivity information extraction unit extracts the luminance change directivity information by summing up two times an absolute value of a difference between luminance values of two pixels located symmetrical with respect to the pixel of interest and an absolute value of a result of subtracting the luminance values of the two pixels from two times a luminance value of the pixel of interest.