Subjective quality of reconstructed images obtained with classical and advanced wavelet coders

Recently a new class of wavelet-image coding techniques has appeared based on an embedded technique. We compare the quality of test images reconstruct ed using the well-known set partitioning technique (SPIHT), trellis coded q uantization using context-based coding (TCQCB), and classical wavelet metho d (scalar quantization and entropy coding). The performance of the TCQCB me thod is better in rate distortion sense than the performance of the SPIHT m ethod. The reconstructed images obtained with the SPIHT method, however, gi ve better visual impressions than the reconstructed images obtained using b oth the trellis context based method and the classical wavelet based method . (C) 2001 Society of Photo-Optical Instrumentation Engineers.