黑白图象假彩色化的一种光学处理技术

An Optical Method of Pseudocolor Encoding for Black and White Images

本文论述了黑白图象假彩色化的一种光学方法。把经过光栅调制的黑白图象记录于全息干板上,通过适当的显影、定影及漂白处理后,制成光栅调制的位相型编码片。在白光信息处理器上,通过付立叶变换、空间滤波及加滤色片等处理可获得等密度的彩色图象输出。适当地变换空间滤波器、滤色片则能使假彩色像具有不同的颜色,并且能按需要使原图象中某种信息得以突出显示。这种枝术简单易行,在输出面所记录的彩色图象颜色丰富,分辨率高。对电子显微镜照片、眼底照片、X光片的假彩色处理结果表明,此项技术具有一定的实用价值。

This thesis discusses an optical method of pseudocolor encoding for blackand white images.Grating modulated black and white images are recorded on theholographic plates.By means of developing,fixing and bleaching,we obtaingrating modulated transprencies.In white light processor,through Fouriertranslation,spatial filtering,we can get pseudocolor image outputs.By alter-nating filters,the outputs can change into different colors,and some certaininformation of the images can become clear.This technique offers simple encod-ing step,and the outputs contain plenty of colors,and have great resolvingpower.The results of applying to electron microscope films,ophthalmologicfilms and x-ray films schow that this technique has great advantage in prac-tical use.