전자공학회논문지B (Journal of the Korean Institute of Telematics and Electronics B)
- 제33B권11호
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- Pages.44-52
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- 1996
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- 1016-135X(pISSN)
Karhunen-loeve 변환과 분류 벡터 양자화에 의한 효율적인 영상 부호화
Karhunen - Loeve Transform -Classified Vector Quantization for Efficient Image Coding
초록
This paper proposes a KLT-CVQ scheme using PCNN to improbe the quality of the reconstructed images at a given bit rate. By using the PCNN and classified vector quantization, we exploit the high energy compaction and compelte decorrelation capbilities of the KLT, and the pdf (probability density function) shape and space-filling advantages of the vQ to improve the performance of the proposed hybrid coding technique. In order to preserve the preceptual fetures such as the edge components in the reconstructed images, we classified the input image blocks according to the texture energy measures of the local statistics and vector-coded them adaptively, and thereby reduces the possible edge degradation in the reconstructed images. The results of the computer simulations show that the performance of the proposed KLT-CVQ is higher than that of the KLT-CSQ or the DCT-CVQ in the quality of the reconstructed images at a given bit rate.
키워드