基于维纳滤波器嵌入的JPEG压缩图像动态增强  

Wiener filter embedding based JPEG compressed image dynamic enhancement

作　　者：郭慧[1] 贺杰[1] 卢振坤[2] 

机构地区：[1]梧州学院信息与电子工程学院,广西梧州543002 [2]广西民族大学信息科学与工程学院,南宁530006

出　　处：《计算机应用研究》2016年第7期2219-2223,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(61362038);广西自然科学基金资助项目

摘　　要：经JPEG编解码处理后的解码图像与原图像差异较为明显,基于此,提出了一种基于维纳滤波器嵌入的JPEG图像动态增强算法。计算压缩图像的嵌入容量,在嵌入容量限制下,根据目标图像动态地计算最优的维纳滤波器对称性、精度等参数并将参数嵌入JPEG压缩图像中,并对解码图像使用提取的维纳滤波器进行滤波增强,获得与原图像接近的解压缩图像。实验结果表明,该算法可单独增强JPEG压缩图像的质量,同时可基于其他图像后处理算法,进一步提高JPEG压缩图像的质量。The decoded image of JPEG compressed image has a obvious difference with original image, aimed at that, this paper proposed a Wiener filter embedding based JPEG compressed image dynamic enhancement algorithm. Firstly, it computed the available embedding capacity. Secondly, under the limitation of embedding capacity, it computed the best Wiener filter parameters dynamically based on the target image, and embedded the parameters into the compressed image. Lastly, filtered the decoded image and enhanced by filter whose parameters were extracted from the bit stream of the compressed image, and outputted the decoded image which was similar with the original image. Experiment results show that the proposed algorithm can enhance the quality of JPEG compressed image independently, and can also improve the quality of compressed image further based on the other post-process algorithm.

关 键 词：压缩图像 图像增强 图像解码 嵌入容量 图像滤波器 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]