| 基于自适应分割和自适应量化的图像压缩算法 |
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| 引用本文： | 张世强,张淑芳,赵嵩,胡青.基于自适应分割和自适应量化的图像压缩算法[J].大连海事大学学报(自然科学版),2009,35(1). |
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| 作者姓名： | 张世强 张淑芳 赵嵩 胡青 |
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| 作者单位： | 大连海事大学信息科学技术学院,辽宁,大连,116026
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| 摘 要： | 为弥补JPEG算法不能自适应不同属性图像的不足,提出一种基于自适应分割和自适应量化的图像压缩算法.利用多闲值分割将图像分割成不同尺寸的平滑子块和细节子块,不同子块采用不同DCT变换和量化方式.本文定义的压缩-信噪比增益(CPR)同时考虑了压缩比(CR)和峰值信噪比(PSNR),可有效评价图像压缩效果,实验结果表明,与传统JPEG算法相比,该算法在PSNR相同情况下,能够获得更高的CR;或者在CR相同情况下,能够获得更高的PSNR.
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| 关 键 词： | 图像压缩 自适应分割 自适应量化 压缩-信噪比增益(CPR) |
Image compression method based on image adaptive segmentation and adaptive quantification |
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| ZHANG Shi-qiang,ZHANG Shu-fang,ZHAO Song,HU Qing.Image compression method based on image adaptive segmentation and adaptive quantification[J].Journal of Dalian Maritime University,2009,35(1). |
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| Authors: | ZHANG Shi-qiang ZHANG Shu-fang ZHAO Song HU Qing |
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| Institution: | ZHANG Shi-qiang,ZHANG Shu-fang,ZHAO Song,HU Qing(College of Information Science , Technology,Dalian Maritime University,Dalian 116026,China) |
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| Abstract: | To make up the deficiency of JPEG method not self-adapting to image with different properties,an image compression method based on adaptive segmentation and adaptive quantification was developed.The image was divided into smooth and detail sub-images with different sizes by using the multi-threshold-segmentation method,and every sub-image used different DCT transform and quantification manner.Compression-to-PSNR rate(CPR) was defined by considering the compression rate(CR) and the peak signal to noise ratio... |
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| Keywords: | image compression adaptive segmentation adaptive quantified compression-toPSNR rate(CPR) |
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