Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 24 Issue 5
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- Pages.833-840
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- 1987
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- 1016-135X(pISSN)
A Study on the Block Truncation Coding Using the Bit-plane Reduction
비트평면 감축을 이용한 블록 절단부호화에 관한 연구
Abstract
A new Block Truncation Coding(BTC) technique reducing the bit-plane and using differential pulse code modulation (DPCM) is proposed and compared with the conventional BTC methods. A new technique decides whether the subblock can be approximated to be uniform or not. If the subblock can be approximated to be uniform(merge mode), we transmit only the gray-level informantion. It not (split mode), we transmity both the bit-plane and the gray-level information. DPCM method is proposed to the encoding of gray-level information when the subblock can be approximated to be uniform. Also modified quantization method is presented to the encoding of gray-level information when the subblock is not uniform. This technique shows the results of coding 256 level images at the average data rate of about 0.75 bits/pel.
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