如何将灰度图像转换为全彩色的rgb？ [英] How to convert grayscale image to rgb with full colors?

问题描述

我正在尝试将灰度图像转换为rgb图像。我在网上搜索并找到了这段代码：

I'm trying to convert a grayscale image to rgb image . I searched the net and found this code:

rgbImage = repmat(grayImage,[1 1 3]);
rgbImage = cat(3,grayImage,grayImage,grayImage);

但这样做只是以3-D矩阵给出灰度图像。
我希望有一种方法可以将它转换为真彩色图像。

but what this does is only give the image in gray-scale with 3-D matrix. I want to have a way that i can convert it into true color image.

推荐答案

不可能直接从其灰度版本恢复彩色图像。正如@Luis Mendo在评论中正确地说的那样，所需的信息并没有实际存储在那里。

It's impossible to directly recover a colour image from the grey scale version of it. As correctly said by @Luis Mendo in the comments, the needed information are not physically stored there.

你可以做的是尝试在强度等级和颜色之间进行映射，然后进行插值。然而，这不会产生良好的结果，而只是一些可能与您想要的距离很远的颜色映射信息。

What you can do is try to come up with a mapping between intensity level and colour, then play around with interpolation. This however will not produce a good result, but just some colour mapping information that may be very far from what you want.

如果您有另一个彩色图像并且想要将其颜色与灰度图像相匹配，您可能需要查看： http://blogs.mathworks.com/pick/2012/11 / 25 / conversion-images-from-grayscale-to-color / 。

特别是引用的函数可以在这里找到： http://www.mathworks.com/matlabcentral/fileexchange/8214-gray-image -to-彩色图像转换＃评论。

If you have another colour image and you want to fit its colours to your grey scale image, you may want to have a look at: http://blogs.mathworks.com/pick/2012/11/25/converting-images-from-grayscale-to-color/ .
In particular the function that is there cited can be found here: http://www.mathworks.com/matlabcentral/fileexchange/8214-gray-image-to-color-image-conversion#comments.

请记住，这将是缓慢的，不会产生很好的结果，但我认为你不能做更多。

Bare in mind that this will be slow and will not produce a great result, however I don't think you can do much more.

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