%0 Journal Article
%T Decision of ROI Scaling Value and ROI Coding<br>感兴趣区域提升幅度确定及编码
%A (Information Science
%A Technology School
%A Hainan University
%A Hainan
%A <br>邓家先
%J 光子学报
%D 2006
%I 
%X In the on-board image coding algorithm, one of the main problems in ROI (Region-of- interest) coding is to decide the scaling value. A novel algorithm for calculating entropy estimate is presented which can approximate to the actual output rate produced by bit-plane coding. Then an algorithm for deciding the scaling value of ROI is proposed by which the scaling value of ROI can be decided correctly. The scaling value is calculated according to the image being coded and the requirement, which does not need inference, with different image complexity different lifted value. So the algorithm in the paper is suitable for those images such as multi-spectral images in which the ROI position is known and their complexity different. The simulation results show that in spite of different complexity the algorithm can decide the lifted value precisely so that the whole reconstructed image quality is better.
%K Image processing
%K Region-of-interest (ROI) coding
%K Entropy estimate
%K Bit-plane scaling<br>图像处理
%K 感兴趣区域编码
%K 熵估计值
%K 比特平面提升
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=FEF506DAFC38FA45&yid=37904DC365DD7266&vid=6209D9E8050195F5&iid=B31275AF3241DB2D&sid=ABE2D40B2765724E&eid=BFB3B49B74E638B4&journal_id=1004-4213&journal_name=光子学报&referenced_num=7&reference_num=13