一种同时实现图像微分和假彩色的方法

A Method for Simultaneously Achieving Image Derivation and Pseudo-Color

在光学信息处理中,为了突出图像的差别和细节,假彩色编码和图像微分都能实现,各有其优点。本文用一种简单的方法将它们结合起来,并吸收两者的长处。先在4F光路中对图像进行微分编码,将所得编码片漂白,用白光作光源,在4F系统中的频谱面上适当滤波,在像面上所得图像具有同时实现图像微分和假彩色编码的效果。还具有处理面积大,处理灰度连续变化图像效果好,微分量可变,色彩丰富的特点。该方法可方便地用于CT片等记录图像的预处理,给这些图像的分析带来了一个新方法。

In optical information processing,the very tiny differences and minutiae in an image can be enlargeded by the image derivations and pseudo-color codes,which have different advantages.In this paper,combining the two methods,a new method is proposed.Firstly,an image is coded by a grating Secondly a white light sourse is used,and the space frequency of the image is filtered in 4F optical system.Then the image derivations and pseudo-color codes on an image with successively changing greyness are realized simultaneously.The proposed method with changeable derivation can process large areas and offer rich color image.With this new method,the pictures such as the CT pictures are easily analyzed forexample.