| 基于Retinex理论的JPEG压缩方法研究 |
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| 引用本文： | 汪荣贵,朱静,张璇,张新龙.基于Retinex理论的JPEG压缩方法研究[J].中国科学技术大学学报,2011,41(8). |
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| 作者姓名： | 汪荣贵 朱静 张璇 张新龙 |
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| 作者单位： | 合肥工业大学计算机与信息学院,安徽合肥,230009 |
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| 基金项目： | 国家自然科学基金(61075032,60705015)资助 |
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| 摘 要： | 现有JPEG压缩标准推荐的色度与亮度量化表,是通过对自然光照下图像色彩数据的统计和实验获得的,不具备偏色校正功能.为此以Retinex理论为基本计算框架,探究并提出一种新的具有色彩恒常性的JPEG压缩方法.该方法通过构建合适的DC系数矩阵来迭代计算DCT系数的局部空间均值,由此估计出照度分量；然后,对照度分量影响信息和边界方向信息进行综合计算来调整亮度量化表,以达到同时实现偏色校正和图像压缩的效果.实验结果表明,与现有的JPEG方法相比,该方法在保持同等压缩比的情况下,具有更好的偏色校正效果.
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| 关 键 词： | 图像压缩 Retinex 色彩恒常性 量化表 边界方向信息 |
A novel JPEG compression method based on Retinex |
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| WANG Ronggui,ZHU Jing,ZHANG Xinlong,FU Jianfeng.A novel JPEG compression method based on Retinex[J].Journal of University of Science and Technology of China,2011,41(8). |
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| Authors: | WANG Ronggui ZHU Jing ZHANG Xinlong FU Jianfeng |
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| Institution: | WANG Ronggui,ZHU Jing,ZHANG Xinlong,FU Jianfeng(School of Computer and Information,Hefei University of Technology,Hefei 230009,China) |
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| Abstract: | JPEG quantization tables for chroma and luminance were obtained from statistics and experiments of color images under natural light and do not have color correction function.So a novel JPEG compression framework with color constancy was proposed.The method combines the Retinex theory with the JPEG compression process,estimating illumination through iterating local space average matrix obtained form a DC coefficient matrix.Last,according to illumination influence information and block edge direction informat... |
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| Keywords: | image compression Retinex color constancy quantization table edge direction information |
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