| 结合DCT近似的分形图像压缩方法 |
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| 引用本文： | 顾炜,王炜,张立明. 结合DCT近似的分形图像压缩方法[J]. 复旦学报(自然科学版), 2000, 39(2): 184-188 |
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| 作者姓名： | 顾炜 王炜 张立明 |
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| 作者单位： | 上海复旦大学电子工程系;上海复旦大学电子工程系;上海复旦大学电子工程系 |
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| 基金项目： | 上海市科学技术发展基金!（95JC1417） |
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| 摘 要： | 分形图像压缩是一种基于分形迭代函数系统理论的图像压缩方法,压缩比大,但编码过程计算复杂、编码时间长,结合离散余弦变换近似的分形图像缩方法,提高了分形压缩中灰度变换的精度,从而达到了提高图像质量,提高比和减少编码时的目的。三种不压缩图像的结果比较证实了新方法的优越性。
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| 关 键 词： | 分形图像压缩 迭代函数系统(IFS) 离散余弦变换(DCT) 灰度变换 |
| 文章编号： | O427-7104(2000)02-0184-05 |
A Fractal Image Compression Method with DCT Approximation |
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| GU Wei,WANG Wei,ZHANG Li-ming. A Fractal Image Compression Method with DCT Approximation[J]. Journal of Fudan University(Natural Science), 2000, 39(2): 184-188 |
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| Authors: | GU Wei WANG Wei ZHANG Li-ming |
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| Affiliation: | Department of Electronic Engineering |
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| Abstract: | Fractal image compressing is a new image compression method based on fractal Iterated Function System (IFS). Although the method can achieve high compression, it will take long time to do image coding with high computational complexity. Fractal compression method combined with Discrete Cosine Transform (DCT ) approximation improves the precision of luminance shift so that high quality, high compression and less encoding time can be achieved. Several standard images are compressed by using three different methods and the results show that the new method is better than others. |
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| Keywords: | fractal image compression iterated function system (IFS) discrete cosine transform (DCT) lumi nance shift |
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