| 基于局部变化率的无损图像压缩方法 |
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| 引用本文： | 赵军.基于局部变化率的无损图像压缩方法[J].重庆邮电学院学报(自然科学版),2001,13(4):23-25. |
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| 作者姓名： | 赵军 |
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| 作者单位： | 重庆邮电学院 重庆400065 |
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| 摘 要： | 介绍一种实现图像无损压缩的预测编码算法。该算法在预测阶段利用像素值的局部变化率来对预测模型进行自适应调整，在编码阶段采用误差反馈技术进一步降低误差图像的信息熵。对标准图像的仿真测试结果表明，该算法的性能明显优于国际标准化组织JPEG－LS提供的标准无损压缩算法。
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| 关 键 词： | 无损压缩 变化率 图像压缩 图像编码 |
A Lossless Image Compression Algorithm Based on Local Variance Ratio |
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| ZHAO Jun.A Lossless Image Compression Algorithm Based on Local Variance Ratio[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2001,13(4):23-25. |
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| Authors: | ZHAO Jun |
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| Abstract: | In this paper,a new predictive coding algorithm is presented for lossless image compression.In this algorithm the local variance ratio of pixel value is considered in prediction process,and the entropy of the predictive error image is further reduced with error feedback technology.The results of simulation test on standard images show that the performance of this algorithm is obviously better than that of the standard algorithm(LOCO I)provided by the JPEG LS of ISO. |
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| Keywords: | image lossless compression variance ratio |
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