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火炮内膛图像照度不均匀的校正方法

Correction of Uneven Illumination on Gun Bore Image

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摘要

受火炮内膛结构、材料与光照等影响,火炮内膛全景图像存在光照不均现象,影响图像的分割质量。采用背景去除法消除内膛图像照度不均,同时在基于小波变换的同态滤波法的基础上,根据贝叶斯萎缩阈值法对其进行了改进,对于经过小波变换后内膛图像的高频子带图像进行加权修正,而对其低频部分进行线性调整。针对校正结果,依据像素信息熵,提出了不同算法对无标准图像改善效果的评价标准。火炮内膛全景图像实验表明,改进算法在保持了原算法大幅度改善图像品质的优点的基础上,减少了边缘信息的丢失。

Abstract

Influenced by gun bore structure and illumination, the gun bore panoramic image has the problem of uneven illumination which will influence the quality of image segment. The de-background is adopted to eliminate the uneven illumination in gun bore images, and the homomorphic filtering based on wavelet is ameliorated through the bayesian shrinkage method. The high-frequency subband images of gun bore panoramic image are revised by weighting, and the low-frequency subband images are modulated linearly. The evaluation criterion for corrections of nonstandard images by different algorithms is proposed. Experimental result of the gun bore panoramic image shows that the modified algorithm can decrease the expense of marginal information, on the basis of improving the image quality primely.

补充资料

中图分类号:TN911

DOI:10.3788/lop48.061002

所属栏目:图像处理

基金项目:军队科研([2009]246)资助课题。

收稿日期:2010-12-31

修改稿日期:2011-02-23

网络出版日期:2011-04-19

作者单位    点击查看

雷洁:军械工程学院火炮工程系, 河北 石家庄 050003
傅建平:军械工程学院火炮工程系, 河北 石家庄 050003
郭琦:军械工程学院火炮工程系, 河北 石家庄 050003

联系人作者:雷洁(1989leijie@sina.com)

备注:雷洁(1989—),男,硕士研究生,主要从事车辆检测、图像处理等方面的研究。

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引用该论文

Lei Jie,Fu Jianping,Guo Qi. Correction of Uneven Illumination on Gun Bore Image[J]. Laser & Optoelectronics Progress, 2011, 48(6): 061002

雷洁,傅建平,郭琦. 火炮内膛图像照度不均匀的校正方法[J]. 激光与光电子学进展, 2011, 48(6): 061002

被引情况

【1】钟兴,张元,金光. 大视场光学系统像面照度均匀性优化. 光学学报, 2012, 32(3): 322004--1

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