Image Error Detection and Error Concealment Technique Based on Interleaving Prediction and Direction Information Hiding

摘要

The advent of the 3G communications era has led to a trend of digital media information being transmitted through wireless network. The variability and high error rate of the wireless communications environment often cause loss of information. Images transmitted in a noisy channel environment tend to be obstructed by unexpected information, which decreases the quality of the image. Therefore, it is an intensive research topic to repair error images and increase their post-transmission quality. Image authentication technique is a mechanism to deal with the malicious image modification problem. However, it can also be used to solve the problem of error image transmission. In this paper, a new image authentication technique is proposed to embed the image block directions as the verification information. At the receiver, the information is then extracted to detect transmission error and incorporated with a newly interleaving prediction method to repair the erroneous regions of the image. In this way, it can not only repair the image, but also detect the image blocks that are erroneous, thus enhancing post-transmission quality of the image.