摘要
根据红外图像的特点,提出了一种基于灰度冗余的红外图像自适应输出窗技术.该技术通过对图像灰度直方图的统计,设定适当的阈值,将灰度像素分布为零的灰度级进行完全压缩,将小于阈值的灰度级映射到阈值灰度级,然后将有效灰度级在整个可显示灰度级范围内作等间距排列.该算法在压缩灰度冗余的同时,实现了对有效图像灰度级的无损均衡,提高了图像质量,并能实现实时处理.
An adaptive output window technique based on gray redundancy for infrared image is proposed in order to overcome the disadvantage of infrared image gray distribution. The adaptive output window threshold is calculated from the histogram,if the pixels sum of the same gray level is zero,this gray level is compressed. Those gray levels which pixel sum is less than the threshold are replaced by gray level of the threshold. Then effective gray-levels are distributed equidistantly . This algorithm can eliminate gray redundance and no gray-level lost. The results show that the image quality has been improved. Theis algorithm achieved real-time processing.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2006年第9期1426-1430,共5页
Acta Photonica Sinica
基金
国防预研项目资助(40405050303)
关键词
输出窗
直方图均衡
图像增强
灰度冗余
实时处理
红外图像
Output window
Histogram equalization
Image enhancement
Gray redundance
Real-time processing
Infrared image
