Patent ID: 6292587
Filing Date: 2001-09-18
Classification: G06T,H04N

Abstract:
An image encoding method, comprising:a first prediction step of predicting the pixel value of a target pixel to be encoded within an image by a first prediction method;a first comparison step of comparing a prediction value predicted in said first prediction step with the pixel value of said target pixel;a step of, when said prediction value and the pixel value of said target pixel match in said first comparison step, encoding and outputting identification information for identifying said first prediction method;a second prediction step of, when the prediction value predicted by said first prediction method and the pixel value of said target pixel do not match in said first comparison step, performing prediction by a prediction method other than said first prediction method;a second comparison step of comparing a prediction value predicted by a prediction method other than said first prediction method with the pixel value of said target pixel; anda step of, when one of prediction values predicted in said second comparison step and the pixel value of said target pixel match, encoding and outputting identification information for identifying the prediction method associated with the one of the prediction values predicted, and when it is determined that any of said prediction values does not match the pixel value of said target pixel, calculating an error between the pixel value of said target pixel and a prediction value predicted by a predetermined prediction method and encoding and outputting the calculated error.