Fast JPEG Color Space Conversion on Shared Memory

With the increasing popularity of multimedia devices and applications, JPEG (Joint Photographic Experts Group) images have been being used in almost all kinds of digital devices. In JPEG compression, color space conversion has become a very important role in the image acquisition, display and the transmission of the color information. This paper experiments the performance of JPEG color space conversion on shared memory; for this purpose, we utilize OpenMP shared programming language and a RGB image is transformed into a luminance-chrominance color space such as YCbCr. The implementation results show 2 times of performance improvements on the processing speed compared with the serial implementation.