Spatial Error Concealment Technique for Losslessly Compressed Images Using Data Hiding in Error-Prone Channels

Abstract

Error concealment technique is significant because of the growing interest in imagery transmission over error-prone channels. In this paper, we present a spatial error concealment technique for losslessly compressed images using LSB-based data hiding to reconstruct a close approximation after the loss of image blocks during image transmission. Before transmission, block description information (BDI) is generated by applying quantization following discrete wavelet transform and embedded into the LSB plane of the original image itself at the encoder. At the decoder, this BDI is used for concealing the missing blocks which have occurred during transmission. Although the original image is modified a little by message embedding, no perceptible artifacts are introduced and the visual quality is enough for analysis and diagnosis. By comparing with previous methods in various loss rates, we show that our technique is promising and has good performance for the loss of isolated and continuous blocks.