Patent ID: 6996289

Claim:
An image processing apparatus comprising image data storing means for storing digital image data obtained by photoelectrically detecting light with a CCD to produce analog image data and digitizing the analog pixel data, memory means for two-dimensionally mapping and storing the digital image data stored in the image data storing means, and abnormal pixel determining means for specifying each pixel in the digital image data stored in the memory means as a subject pixel, reading density signal level of the subject pixel together with density signal levels of pixels adjacent to the subject pixel, comparing the density signal level of the subject pixel with the density signal levels of pixels adjacent to the subject pixel and defining the subject pixel as an abnormal pixel when difference between the density signal level of the subject pixel and the density signal levels of pixels adjacent to the subject pixel is greater than a predetermined level, wherein the abnormal pixel determining means is constituted so as to calculate an average value A, the maximum value MAX and the minimum value MIN of the density signal levels of pixels adjacent to each subject pixel and judge that the difference between the density signal level of the subject pixel and the density signal levels of the pixels adjacent to the subject pixel is greater than the predetermined level when the density signal level x of the subject pixel satisfies: x>A +(MAX−MIN)* n , or x<A −(MAX−MIN)* n wherein n is a positive constant.