利用白平衡进行偏色图像的颜色校正  

Colour Correction Based on White Balance

作　　者：郭永刚[1] 葛庆平[1] 郭楠[1] 

机构地区：[1]首都师范大学信息工程学院,北京100037

出　　处：《计算机工程与应用》2005年第20期56-59,共4页Computer Engineering and Applications

基　　金：国家863高技术研究发展计划项目资助(编号:2001AA115190);北京市教委项目(编号:KM200310028109)

摘　　要：在图像处理领域,大量研究基于景物的颜色特征,所以要保证景物在不同光照下的颜色恒常性。文中提出了一种新的监督颜色校正方法。在拍摄背景中放置黑白渐变的基准板,利用黑平衡和白平衡的原理,通过对基准板所成图像的R、G、B通道累积直方图的分析,得到对偏色图像各通道灰度值的校准方法,来校准整幅图像。实验结果表明,校准图像与颜色正常图像视觉效果基本一致,校正效果较好,方法简洁实用。In the field of image processing,a great deal of research is carried on the basis of color information of the objects.Therefore,to guarantee the color consistency is important.It proposes a new supervised color correction method.A board containing colors shade from black to white is deployed as a color benchmark.This board is photographed in the background of the scene.Then the histograms of RGB channel of the board are analyzed based on white balance and black balance to obtain parameters to correct the color of the whole image.Experiments results show that the corrected image produces more similar visual effects to the normal image than the uncorrected image does.

关 键 词：白平衡 颜色校正 直方图 累积直方图 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]