以红色圆形印鉴为例，利用票据图像的彩色信息进行处理，把图像转换为灰度图像后，突出了原来的红色分量。

The red seal is selected as research sample. This seal is processed by color information of note image.

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通过在HSV彩色空间计算欧式距离，把彩色图像转换为灰度图像，然后利用灰度图像的分割方法对车辆进行分割。

With Euclid distance computed in HSV space, color image is translated into grayscale image, which segmentation methods can be applied in to partition the vehicle from the background.

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本文介绍将灰度图象转换为接近自然光谱色的两种实现方法。

The two ways of changing grey picture into nearly natural spectrum color are introduced in this paper.

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