- 期刊
Visual Quality Improvement for Ordered Dither Block Truncation Coding
摘要
Ordered dither block truncation coding (ODBTC) employs the ordered dither technique to produce the bitmap required in traditional block truncation coding (BTC). It can reduce the complexity of computations in the coding phrase. However, the blocking artifacts and undesired noises are still in the decoded images by ODBTC. In this paper, the properties of thresholds stored in the dither matrices are considered to estimate the decoded pixel intensities. That is, the dither matrices are used in both coding and decoding. Experimental results tell that the proposed schema can not only reduce quantization error but also improve the visual quality for the reconstructed images by ODBTC.
延伸閱讀
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