Patent ID: 7187785

Claim:
An image processing apparatus comprising image correcting means for, when an image of an object is input, performing correction processing for an input image including the object image and outputting the corrected image as an image required for authentication of the object, wherein said image correcting means comprises: determination image generating means for generating a determination image for determination of the input image; a plurality of pre-processing means each for performing one of erosion processing in which an input image is set as a first image, the first image is overlaid on a second image obtained by shifting the first image in a predetermined direction on a pixel basis, and a minimum value of luminance values between pixels at the same position on the first and second images is computed and dilation processing in which the input image is set as a first image, the first image is overlaid on a second image obtained by shifting the first image in a predetermined direction on a pixel basis, and a maximum value of luminance values between pixels at the same position on the first and second images is computed; and combining means for combining output images from said plurality of pre-processing means on the basis of the determination image generated by said determination image generating means.