基于灰度冗余的红外图像自适应输出窗技术

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 Adaptived Output Window Technique Based on Gray Redundance for Infrared Image

An adaptive output window technique based on gray red undancy for infrared image is proposed in order to overcome the disadvantage of infrared image gray distribution.The adaptive output window threshold is calcula ted from the histogram,if the pixels sum of the same gray level is zero,this gra y level is compressed.Those gray levels which pixel sum is less than the thresho ld are replaced by gray level of the threshold.Then effective gray-levels are d istributed equidistantly .This algorithm can eliminate gray redundance and no gr ay-level lost.The results show that the image quality has been improved.Theis a lgorithm achieved real-time processing.