圖像的四叉樹平面編碼
QUAD TREE PLANE SURFACE APPROXIMATION METHOD FOR IMAGE CODING
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摘要: 該文提出了一種平面逼近圖像編碼方法及其四叉樹實(shí)現(xiàn)方案。在最小二乘方準(zhǔn)則下,對(duì)于給定的圖像子塊,找到一個(gè)最佳平面,并用其上的點(diǎn)逼近圖像的像點(diǎn)。于是,只需要對(duì)該平面的三個(gè)描述參數(shù)進(jìn)行編碼,編碼質(zhì)量和圖像子塊的平坦程度和大小有關(guān),因此,可按照對(duì)編碼質(zhì)量的要求,以四叉樹結(jié)構(gòu)選擇可變大小的圖像子塊。
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關(guān)鍵詞:
- 圖像壓縮編碼; 平面逼近; 平面編碼; 四叉樹
Abstract: A plane surface approximation method for image coding and its quad tree scheme are presented in this paper. For a given image block, an optimal plane is found under the min-imum square error criteria, and the pixels of the block are approximated by the corresponding points on the plane. As a result, only three description parameters of the plane are needed to. be encoded. The coding quality is related to the smoothness and the size of the block. Therefore, variable block size can be chosen with a quad tree structure based on the quality requirement. -
盧朝陽,模型優(yōu)化及其在DT模型基圖像編碼中的應(yīng)用,通信學(xué)報(bào),1997,18(6),1-6.[2]A.E.Jacquin,Fractal image coding,A review.Proc.IEEE,1993,81(10),1451-1465[3]王祥林,吳國威,林行剛,一種基于零樹的多碼率小波圖像編碼方法,電子學(xué)報(bào),1997,25(4),48-51.[4]L.Chiariglioine,The MPEG-4 standard.通信學(xué)報(bào),1998,19(9),54-67. -
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