An Image Error Detection and Error Concealment Scheme based on Interleaving Prediction and Block Direction Hiding

• Main Authors: Chen-Husan Tasi, 蔡宸玄
• Other Authors: Kuo- Lung Hung
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/69392880853123110295

碩士 === 朝陽科技大學 === 資訊管理系碩士班 === 94 === 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 PSNR value of the image. Therefore, it is an intensive research topic to repair error images and increase their post-transmission quality. This paper proposes two repair strategies based on image block direction information and detective factor to elevate post-transmission quality. However, the repair strategy without good mechanisms to detect image errors does not result in performance of repair capabilities. Therefore, the repair method in this paper utilize blind watermarking technique embed restoration data in an 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.