基于灰度级共享的红外热像显示与增强  

Display and enhancement of IR thermal image based on shared gray-level

作　　者：胡永生[1] 陈钱[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《红外与激光工程》2007年第4期475-478,共4页Infrared and Laser Engineering

基　　金：国防预研项目(40405050303)

摘　　要：随着大动态范围热成像器件的广泛使用,有必要研究适合人类视觉特性的红外热像终端显示系统。讨论了目前常用的基于自动增益和偏移和基于直方图均衡的压缩技术,并对它们应用于热像的动态范围压缩显示的效果进行了分析比较。提出了一种基于灰度级共享的热像显示技术,将目标和背景各自压缩到全部灰度空间,再进行融合显示。算法尽量保留了热像的细节,符合人类视觉响应特性。通过将16位热像转换为8位灰度图显示,仿真结果验证了该算法具一定的工程实用性。With popularization of large dynamic range IR thermal imaging system, it is necessary to study IR-image-display terminals which suit for human visual properties. Two popular techniques, including auto control of temperature window＇s gain and level and range compressing based on histogram equalization, are discussed. Effects when these algorithms are applied to the large dynamic range compression for IR image are compared. A display technique is presented for thermal image based on sharing gray levels, which compresses target and backgrounds into all gray levels respectively and then fuses them together. The algorithm reserves most of details and fits the neural response of human eyes. Experimental results show that the algorithm has practical values for IR thermal image display by translating a raw 16 bit image into an enhanced gray image for display.

关 键 词：红外 热像显示 动态范围压缩 图像增强 直方图均衡 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]