A Backward Compatible JPEG Image Coding for High Dynamic Range Image

Recently, the standardization of backward compatible JPEG image coding for high dynamic range image has been undertaken to establish an international standard called JPEG XT. Currently, three profiles called Profiles A, B, and C have been proposed for JPEG XT. Whereas all these profiles perform their image coding in the spatial domain, this paper proposes a new coding approach by manipulating DCT coefficients of image to achieve easy implementation to minimize the process of decoding. The experiment shows that the proposed image coding achieves PSNR improvements at low data bit rates and computing time savings. Keywords—backward compatible image coding; JPEG XT; high dynamic range image; PSNR performance;