Convert 2D image to 3D with color map

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michael
michael 2016-7-7
评论： michael 2016-7-12
Hello,
I have a color image of radiation pattern.
I'd like to convert this image into a 3D image, based on color map (which is coming along with the image).
Example of image that I have.
Please suggest.
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Guillaume
Guillaume 2016-7-11
编辑：Guillaume 2016-7-11
What do you call a 3D image? And how do you intend to visualise it?
Where is the 3rd dimension encoded if you start with a 2D image?

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-7-7
Y = ind2rgb(X,map)
Image Analyst
Image Analyst 2016-7-7
That's an RGB image so it's already 3D.
By 3-D, do you mean a surface, like you'd get from surf()? If so, you'll have to read the colors in your color bar and then create a colormap - a 10 by 3 array of RGB colors. Then you'll have to use rgb2ind() to turn that RGB image into a single valued, monochrome image, at which point you can then use surf to make a 2.5-D perspective rendering where the gray level is like a height above the x-y plane.
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Image Analyst
Image Analyst 2016-7-11
I can agree with that. They're both 3D arrays but they're just interpreted differently. One is interpreted as a color or hyperspectral image while the other is interpreted as a grayscale volumetric image. You could even have a 4D array interpreted as a color volumetric image or as a series of color images (like a video). To view a 3-D monochrome or color volumetric image you'd have to use a different program like Avizo, because MATLAB just isn't set up for that kind of visualization and is limited to primitive cut-away slice views and isosurfaces.
michael
michael 2016-7-12
I have 2D image which is colored. I'd like to use the color as the 3rd dimension, based on color map.
In the image which was attached, red has a value of 90 and therefore it would be the highest point in the 3rd dimension, then orange, yellow, green and blue which would be nearly 0 in the 3rd dimension.
Hope that it is more clear now.

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