Abstract: An image processing apparatus includes first and second standard-deviation calculating circuits for calculating deviations ?1 and ?2 indicating a luminance bias of each pixel forming an input image. The deviation ?1 is calculated by referring to an average luminance of first block images forming the input image, and the deviation ?2 is calculated by referring to an average luminance of second block images forming the input image. A first correction-coefficient calculating circuit adjusts a correction coefficient K1 based on the deviation ?1, and a second correction-coefficient calculating circuit adjusts a correction coefficient K2 based on the deviation ?2. A Y correcting circuit corrects the luminance of each pixel forming the input image by referring to the correction coefficients K1 and K2. A CPU determines an input-image-attribute including presence/absence of a face image of a person so as to change adjustment characteristics of the correction coefficients K1 and K2.

Abstract: An image processing apparatus includes first and second standard-deviation calculating circuits for calculating deviations ?1 and ?2 indicating a luminance bias of each pixel forming an input image. The deviation ?1 is calculated by referring to an average luminance of first block images forming the input image, and the deviation a2 is calculated by referring to an average luminance of second block images forming the input image. A first correction-coefficient calculating circuit adjusts a correction coefficient K1 based on the deviation ?1, and a second correction-coefficient calculating circuit adjusts a correction coefficient K2 based on the deviation ?2. A Y correcting circuit corrects the luminance of each pixel forming the input image by referring to the correction coefficients K1 and K2. A CPU determines an input-image-attribute including presence/absence of a face image of a person so as to change adjustment characteristics of the correction coefficients K1 and K2.

Abstract: The present invention is concerned with a novel monoclonal antibody which binds strongly to a protein antigen associated with human tumors, including carcinomas of the colon, breast, ovary and lung, as well as melanomas and sarcomas. The antibody binds to normal human cells to a much lesser degree than to tumor cells. The antibody finds use both in diagnostic methods such as the detection of malignant cells associated with tumors and in therapeutic methods for treatment of humans with tumors. Also disclosed is a novel 100,000 dalton glycoprotein antigen found on the cell surface of human tumor cells. The amino terminal amino acid sequence of this antigen is: ##STR1## in which X represents an unidentified amino acid.