Algorithm for JPEG2000 rate control based on number of coding passes

Post-compression rate-distortion optimization (PCRD-opt) algorithm in JPEG2000 needs to calculate rate-distortion slope of every truncation point, and increases the cost of computation and storage as well. A new algorithm is proposed for JPEG2000 rate control, which truncates the code stream by the number of coding passes and needn't to calculate rate distortion slope. Compared with the standard post-compression rate-distortion optimization algorithm, experimental results show that the proposed algorithm reduces the total encoding time with negligible loss in power signal-to-noise ratio (PSNR).