A Lossless Compression Method for Medical Image Sequences Using JPEG-LS and Interframe Coding
A Lossless Compression Method for Medical Image Sequences Using JPEG-LS and Interframe Coding
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DOI：
10.1109/titb.2009.2022971
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发表时间：
2009-09
影响因子：
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通讯作者：
S. Miaou;Fu-Sheng Ke;Shu-Ching Chen
中科院分区：
文献类型：
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作者：
S. Miaou;Fu-Sheng Ke;Shu-Ching Chen
医院和医疗中心每天产生大量的数字医学图像，特别是以图像序列的形式，这需要相当大的存储空间。一种解决方案可能是应用无损压缩。在现有的方法中，JPEG-LS具有优异的编码性能。然而，它只对单个图像进行帧内编码，没有利用图像之间的帧间相关性。因此，本文提出了一种方法，结合JPEG-LS和帧间编码与运动矢量，以提高单独使用JPEG-LS的压缩性能。由于医学图像序列中的两个相邻图像之间的帧间相关性通常不如一般视频图像序列中的帧间相关性高，因此仅当帧间相关性足够高时才激活帧间编码。对6个胶囊内窥镜图像序列进行测试，与单独使用JPEG-LS和JPEG2000的方法相比，该方法分别实现了13.3%和26.3%的平均压缩增益。类似地，对于MRI图像序列，相应地获得77.5%和86.5%的编码增益。
Hospitals and medical centers produce an enormous amount of digital medical images every day, especially in the form of image sequences, which requires considerable storage space. One solution could be the application of lossless compression. Among available methods, JPEG-LS has excellent coding performance. However, it only compresses a single picture with intracoding and does not utilize the interframe correlation among pictures. Therefore, this paper proposes a method that combines the JPEG-LS and an interframe coding with motion vectors to enhance the compression performance of using JPEG-LS alone. Since the interframe correlation between two adjacent images in a medical image sequence is usually not as high as that in a general video image sequence, the interframe coding is activated only when the interframe correlation is high enough. With six capsule endoscope image sequences under test, the proposed method achieves average compression gains of 13.3% and 26.3 % over the methods of using JPEG-LS and JPEG2000 alone, respectively. Similarly, for an MRI image sequence, coding gains of 77.5% and 86.5% are correspondingly obtained.