Patent ID: 7474792
Filing Date: 2009-01-06
Classification: H04N

Abstract:
1. An image processing apparatus, comprising: a reading unit to read estimated distortion amount information showing how much a decoded image is degraded from an original image when data are eliminated from a data sequence, the estimated distortion amount information being included in a code sequence for progressively displaying the image, in which the original image is compressed and encoded in accordance with a method capable of progressively displaying the image; an error detecting unit to detect an occurrence of an error in header information for each unit of the code sequence based on a location of an end of packet header marker; a distortion amount calculating unit to calculate a distortion amount of the decoded image against the original image when the code sequence is decoded after the data are eliminated from the code sequence by using the estimated distortion amount information concerning the data in which the error is detected by the error detecting unit; and a comparing unit to compare the distortion amount calculated by distortion amount calculating unit with a threshold and determine whether the code sequence should be decoded or not based on the comparison result.