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A Lossless Compression Method for Medical Image Sequences Using JPEG-LS and Interframe Coding

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3 Author(s)
Shaou-Gang Miaou ; Electron. Eng. Dept., Chung-Yuan Christian Univ., Chungli, Taiwan ; Fu-Sheng Ke ; Shu-Ching Chen

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.

Published in:

IEEE Transactions on Information Technology in Biomedicine  (Volume:13 ,  Issue: 5 )