Patient video compression using 3-D block transforms for telemedicine applications
MS'06 Proceedings of the 17th IASTED international conference on Modelling and simulation
Adaptive threshold-based block classification in medical image compression for teleradiology
Computers in Biology and Medicine
3-D medical image compression using 3-D wavelet coders
Digital Signal Processing
Journal of Real-Time Image Processing
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A new three-dimensional (3-D) discrete cosine transform (DCT) coder for medical images is presented. In the proposed method, a segmentation technique based on the local energy magnitude is used to segment subblocks of the image into different energy levels. Then, those subblocks with the same energy level are gathered to form a 3-D cuboid. Finally, 3-D DCT is employed to compress the 3-D cuboid individually. Simulation results show that the reconstructed images achieve a bit rate lower than 0.25 bit per pixel even when the compression ratios are higher than 35. As compared with the results by JPEG and other strategies, it is found that the proposed method achieves better qualities of decoded images.