Lossless Compression of DSA Image Sequence Based on D 2PCM Coder
基于D^2PCM的数字减影图象序列无损压缩算法

DPCM is a lossless compression method used widely. A novel D 2PCM compression technique has been developed in this paper for more effective lossless compression of DSA (Digital Subtraction Angiography) image sequence, in which the correlation between subtraction images remains meaningful. By applying the lossless DPCM coder to the subtraction image, it constitutes a two order differential coding scheme in spatial and temporal space . This proposed method is able to sufficiently reduce the temporal spatial correlation. The high lossless compression ratio achieved by this technique will favor the transmission speed and storage space. The results in real applications prove it practicable and robust.