Image retrieval in compressed domain based on salient closed boundary
Jianmin Jiang · Jisuanji gongcheng yu sheji · 2008
A new image retrieval algorithm which based on salient closed boundary extracted directly from compressed domain is pro-posed.Firstly,block edges is extracted directly from compressed domain without decompressing.Secondly,network flow based ratio contour algorithm is used to extract salient closed boundary.Finally,Fourier descriptors is used to describe the closed boundary and re-trieve images.Experimental results demonstrate that extracting block edge from compressed domain saves a lot of computation cost,and using the detected closed boundary in the image retrieval gets a high precision.