頁籤選單縮合
題 名 | An Adaptive Quantization Scheme for 2-D DWT Coefficients |
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作 者 | Chen, Po-yueh; Chang, Jia-yu; | 書刊名 | International Journal of Applied Science and Engineering |
卷 期 | 11:1 2013.03[民102.03] |
頁 次 | 頁85-100 |
分類號 | 312.1 |
關鍵詞 | Image compression; Quantization; DWT coefficients; |
語 文 | 英文(English) |
英文摘要 | Two-dimensional Discrete Wavelet Transform (2-D DWT) is an effective tool for image compression and hence attracts much attention in recent years. In this paper, we propose an adaptive quantization approach which quantizes the DWT coefficients according to their characteristics. Unlike the uniform quantization which uses a fixed quantization interval, the proposed scheme applies two asymmetric interval widths to one single sub-band. According to the experiment results, it leads to a superior image quality while maintaining the same compression ratio. |
本系統中英文摘要資訊取自各篇刊載內容。