摘要： 为满足打火机火焰图像采集时对曝光的不同要求，提出一种快速自动曝光算法。根据火焰亮度计算曝光时间，并利用该曝光时间与图像灰度之间的关系，使用二分法确定曝光时间的范围。实验结果表明，该算法在不同情况下能正确、快速地对打火机火焰的曝光时间进行调节，使曝光正确率达到97.2%。

关键词: 图像处理, 自动曝光, 打火机火焰, 二分法, 灰度值

Abstract: A new auto-exposure algorithm is proposed to solve the different requirements of exposure parameter, which is because of the different flame types and the flame itself flaring in the gathering process of the lighter flame image. Preliminary this paper calculates the exposure parameter based on the brightness of the flame, then combines the relationship between exposure time and gray of the image with dichotomy for determining the scope of the exposure time. Experimental results show that the exposure time of this algorithm can be controlled correctly, fleetly and automatically according to the different lighter flame. The precision of the auto-exposure is more than 97.2%.

Key words: image processing, auto-exposure, lighter flame, dichotomy, gray value

中图分类号: 

• TP301.6