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Gray-level image of JPEG i've added to workspace

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bigdog
bigdog 2015-2-4
关闭： MATLAB Answer Bot 2021-8-20
I'm having trouble turning the colored image JPEG I've added to my workspace. I have been using the following code: image(tw2); colormap(gray); But this doesn't work and there are no errors. Any ideas?

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Image Analyst
Image Analyst 2015-2-4
What does "turning" mean to you? Applying a color map? Rotating? Flipping? Transforming in some other way? Color maps don't apply to color images , only to gray scale or indexed images. Did you know that? A color image is already color so there are no indexes that you can use to replace the color with a color selected from an N by 3 colormap array.

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