Title：Near-lossless image compression and decompression method for wireless endoscope system
Country：China
Patent No.：200510126255.3
Legal Status：Authorized
Inventor：Xiang Xie, Guolin Li, Xiaowen Li, Zhihua Wang
Assignee：Tsinghua University
Address：Mailbox No. 82, Beijing 100084
Filing Date：2005-12-02
Issue Date：2008-06-18
Abstract：
The invention belongs to field of medical digital picture compression technique, which is a picture compression and decompression method based on compression first and color interpolation later, removing the high-frequency component of the picture with low-pass filter before compression, controlling the filtered wave picture dot percentage of the whole picture with mass controlling factor to improve the picture quality, determining the pixel area directly for coding without compression with interesting area to guarantee the picture quality in interesting area. The compression without damage is coded with JPEG-LS compression. The hardware diagram is relatively provided. Compressing the seven natural picture in the standard picture database for experiment, realizing the continuously adjustment of signal-to-noise ratio from 46.37 dB to infinity, the relevant compression rate changing in range of from 3.3 bit/ pixel point to 6.9 bit/ pixel point; if compressing the wireless endoscope picture, we can get the average picture compression rate of 2.18 bit/ pixel point and PSNR larger than 47.57dB.
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