Patent ID: 6456302
Filing Date: 2002-09-24
Classification: G09G,H04N

Abstract:
An image evaluation apparatus which generates evaluation images for moving images displayed on an image display apparatus which expresses gray scale of the moving images by illumination modulated over time, the image evaluation apparatus comprising:a subfield ON/OFF information generating means which, having an information source which includes information concerning subfields which are defined in the image display apparatus, receives an input image signal of one TV field and converts the input image signal into subfield ON/OFF information by referring to the information source for each pixel, the subfield ON/OFF information showing a state of each subfield, the state being either of ON and OFF which respectively correspond to illumination and non-illumination; a standard point setting means which sets a standard point to a pixel on a virtual image which is virtually displayed based on the subfield ON/OFF information; a course calculating means for calculating a course which is formed by a movement from the standard point to a point in a unit time, the calculation being performed in accordance with a motion vector input which corresponds to the input image signal; an illumination amount calculating means for, in accordance with the subfield ON/OFF information, calculating illumination amounts on the virtual image of pixels which neighbor the course calculated by the course calculating means; an illumination amount totaling means which adds up the illumination amounts on the virtual image calculated by the illumination amount calculating means for one TV field and outputs a total illumination amount as a total illumination amount of the standard point for one TV field; and an evaluation means for generating evaluation information from the total illumination amount output by the illumination amount totaling means, the evaluation information showing a state of an image displayed on the image display apparatus.