PEG/JPEG-2000 COMPRESSED IMAGE QUALITY MEASUREMENT USING CONTEXT INFORMATION

摘要

The present invention relates to a JPEG 2000 compressed image quality estimation method using context information. The encoder performs encoding according to JPEG 2000, extracts entropy information of context information generated in the bit plane of each subband as a reference signal, and compresses The video bit stream is transmitted through a noise channel such as a general network, the entropy information is transmitted through a secure channel, the decoder decodes the video bit stream transmitted from the encoder, extracts entropy information of the received video bit stream, and evaluates the quality. The encoder compares the entropy information transmitted to the secure channel with the entropy information extracted from the decoder, calculates the difference, and compares the preset value with the preset value to determine the difference between the difference and the image quality. To perform the final decoding process, Otherwise, the present invention provides a method for evaluating JPEG 2000 compressed image quality using context information that requires retransmission to an encoder, thereby reducing memory requirements and prediction time for quality estimation.;JPEG2000, Quality, Evaluation, Entropy