Chung, Kuo-LiangKuo-LiangChungHuang, Hsu-LienHsu-LienHuangHSUEH-I LU2020-05-042020-05-042004https://scholars.lib.ntu.edu.tw/handle/123456789/488636Efficient region segmentation on compressed gray images using quadtree and shading representation.journal article10.1016/j.patcog.2004.02.009https://doi.org/10.1016/j.patcog.2004.02.009