A wavelet based intra-frame coding algorithm focussing on face region

For very low bit-rate video coding, encode the region of interest with higher priority will achieve better decoded image, in this paper, we discuss a simple but robust face tracking technique base on color histogram analysis, this technique can locate the region of interest (face region) in head-shoulder image sequence, moreover, a wavelet based ultra-frame codec that focusing on face region is proposed, which is called Set Partition in Wavelet Block (SPWB). Experimental results show that SPWB codec achieved better decoded image than H.26L intra-frame codec at the same compression ratio.