Title :
A combined-transform coding (CTC) scheme for image data compression
Author :
Zhang, Ya-Qin ; Pickholtz, Raymond L. ; Loew, Murray H.
Author_Institution :
Contel Technol. Center, Chantilly, VA, USA
Abstract :
A combined-transform-coding (CTC) method that reduces the blocking effect of the baseline two-dimensional discrete-cosine-transform (DCT) coding scheme is proposed. Several computer simulation results are presented to demonstrate the improvement provided by the CTC scheme in subjective quality. It is pointed out that the idea of combined coding (CC) can also be used in noiseless coding. Experimental results show that the compression performance for CC is better than that of coding an image as a whole. Several experimental results are tabulated for a set of chest anterior-posterior (AP) view X-ray images. The advantages of the CTC scheme include no ringing effect due to no error propagation across block boundaries, no additional computation, and the ability to hold distortion below a certain threshold
Keywords :
data compression; encoding; picture processing; X-ray images; baseline 2D DCT coding; blocking effect; combined coding; combined-transform coding; compression performance; distortion threshold; image data compression; noiseless coding; subjective quality; Application software; Bit rate; Data compression; Discrete cosine transforms; Image coding; Image reconstruction; Noise reduction; Quantization; Signal to noise ratio; Transform coding;
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
DOI :
10.1109/GLOCOM.1990.116647
