计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
20期
5-9
,共5页
视觉注意%遥感图像%压缩编码%可变分辨率
視覺註意%遙感圖像%壓縮編碼%可變分辨率
시각주의%요감도상%압축편마%가변분변솔
visual attention%remote sensing image%compression encoding%variable resolution
图像压缩是遥感图像处理的重要研究领域，现有的压缩方法要么丢失重要的细节信息，无法满足实际的应用需要，要么压缩率过低，难以达到实时处理的要求。将视觉注意机制引入到遥感图像压缩中，对不同的显著性区域采用不同的压缩率，这样不仅可以对整个遥感图像达到一个高的压缩率，而且还可以保持重要区域的高分辨率，实现了可变分辨率的图像压缩。实验结果表明在前几个显著性区域中，该方法得到的图像压缩性能指标优于传统压缩方法得到的性能指标。
圖像壓縮是遙感圖像處理的重要研究領域，現有的壓縮方法要麽丟失重要的細節信息，無法滿足實際的應用需要，要麽壓縮率過低，難以達到實時處理的要求。將視覺註意機製引入到遙感圖像壓縮中，對不同的顯著性區域採用不同的壓縮率，這樣不僅可以對整箇遙感圖像達到一箇高的壓縮率，而且還可以保持重要區域的高分辨率，實現瞭可變分辨率的圖像壓縮。實驗結果錶明在前幾箇顯著性區域中，該方法得到的圖像壓縮性能指標優于傳統壓縮方法得到的性能指標。
도상압축시요감도상처리적중요연구영역，현유적압축방법요요주실중요적세절신식，무법만족실제적응용수요，요요압축솔과저，난이체도실시처리적요구。장시각주의궤제인입도요감도상압축중，대불동적현저성구역채용불동적압축솔，저양불부가이대정개요감도상체도일개고적압축솔，이차환가이보지중요구역적고분변솔，실현료가변분변솔적도상압축。실험결과표명재전궤개현저성구역중，해방법득도적도상압축성능지표우우전통압축방법득도적성능지표。
Image compression is one of important research fields in remote sensing image processing. Existing compression methods either miss important details or adopt low compression rate, which can not meet the actual needs of the application and it is difficult to achieve real-time processing requirements. This paper proposes a remote sensing image compression method based on visual attention mechanism. Various compression ratios are adopted according to the different saliency regions. By this method, it not only achieves high compression ratios for entire image, but also keeps high resolution for important regions. Experimental results indicate that in first few saliency regions, the image compression performance indicators of the method are better than that of conventional methods.
