首页> 外文会议>European Signal Processing Conference(EUSIPCO 2005); 20050904-08; Antalya(TK) >IMPROVING COMPRESSION RATIO FOR SATELLITE TRANSMISSION BY USE OF CLOUD EXTRACTION
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IMPROVING COMPRESSION RATIO FOR SATELLITE TRANSMISSION BY USE OF CLOUD EXTRACTION

机译:通过使用云提取提高卫星传输的压缩比

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This paper presents an alternative approach to JPEG 2000 based ROI coding, for use on-board satellite image compression. The proposed method works in the wavelet domain and modifies the wavelet coefficients in a way to allocate fewer bits for cloud-covered areas. This approach improves compression ratio and/or improves the quality of un-cloud-covered areas. The algorithm is implemented with pixel based and codeblock based schemes. Pixel based scheme can be embedded into any wavelet transform based codec. Both schemes allow packing of the coefficients into a fully JPEG2000 decoder compatible bitstream as soon as a codeblock is formed. The performance of the proposed schemes are demonstrated by tests on real satellite images acquired by BILSAT I.
机译:本文提出了一种基于JPEG 2000的ROI编码的替代方法,用于机载卫星图像压缩。所提出的方法在小波域中工作,并以为云覆盖区域分配较少比特的方式修改小波系数。这种方法提高了压缩率和/或提高了未云覆盖区域的质量。该算法通过基于像素和基于代码块的方案来实现。基于像素的方案可以嵌入到任何基于小波变换的编解码器中。一旦形成代码块,这两种方案都允许将系数打包到完全兼容JPEG2000解码器的比特流中。通过对BILSAT I获得的真实卫星图像进行测试,证明了所提出方案的性能。

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