Reconstruction of baseline JPEG coded images in error prone environments

In this paper, a two-stage method for the reconstruction of missing data in the transmission of baseline JPEG coded images in error prone environments is proposed. In the first stage, we estimate the values of the missing dc coefficients. As effects of errors in estimating the missing dc values will appear as a number of stripes across the image, a technique for removing such stripes is also developed. In the second stage, the data of missing blocks is reconstructed by exploiting the correlation between adjacent blocks. Simulation results indicate that our reconstruction method performs very well. The two key contributions of our method are that it does not assume nondifferential encoding of the dc coefficients, and that it performs well in the reconstruction of diagonal edges.