一种基于直方图的亮度评估探究  

Research on Brightness Evaluation Based on Histogram

作　　者：王海丰 李娟 WANG Haifeng;LI Juan(Nanjing Bilin Intelligent Identification Technology Co.,Ltd.,Nanjing Jiangsu 210000,China;Nanjing Panda Handa Technology Co.,Ltd.,Nanjing Jiangsu 210000,China)

机构地区：[1]南京比邻智能识别技术有限公司,江苏南京210000 [2]南京熊猫汉达科技有限公司,江苏南京210000

出　　处：《信息与电脑》2021年第22期124-126,共3页Information & Computer

摘　　要：图像直方图用于对图像中各个灰度级上的像素点进行统计,能够直观表现不同灰度图像目标的分布情况。在对直方图峰值与场景目标间关系进行分析的基础上,发现峰值位置能够反应图像亮度,不同峰值间距的减小或消失则对应图像对比度的降低或目标表现力的弱化。为高效准确地提取直方图峰值信息,采用直方图百分位数进行定义描述,据此对偏暗、偏亮和正常图像分别提出基于数值计算的亮度评估方法。经过实际测试,验证了该设计方法进行亮度评估具有一定的的准确性、合理性及有效性。The image histogram is used to count the pixels of each gray level in the image,and can intuitively show the distribution of different gray-scale image targets.Based on the analysis of the relationship between the histogram peak and the scene target,it is found that the peak position can reflect the image brightness,and the reduction or disAppearance of different peak spacing corresponds to the reduction of image contrast or the weakening of target expressiveness.In order to extract the peak information of the histogram efficiently and accurately,the percentiles of the histogram are used to define and describe.Based on this,a brightness evaluation method based on numerical calculation is proposed for dark,bright and normal images.Through actual tests,it is verified that the design method has certain accuracy,rationality and effectiveness for brightness evaluation.

关 键 词：图像直方图 直方图峰值 场景目标 亮度评估 

分 类 号：TB852.1[一般工业技术—摄影技术]