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Problem on gray scale image.

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Esther
Esther 2012-9-19
Hi. i used gray = rgb2gray(I) at command window but why can't i get a grayscale image? thank you!

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回答（2 个）

Walter Roberson
Walter Roberson 2012-9-19
grayscaleimage = rgb2gray(I);
image(grayscaleimage);
colormap(gray);
Please note that "gray" is a MATLAB function for constructing grayscale colormaps. Writing to a variable named "gray" interferes with using the function "gray".
Esther
Esther 2012-9-20
thanks for answer. i did this tutorial, http://www.mathworks.com/videos/developing-algorithms-with-matlab-68914.html just that i used a color image instead of a gray image. but i couldn't get a grayscale.
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Walter Roberson
Walter Roberson 2012-9-20
Okay, and then what do you do with grayImage to display it?
Image Analyst
Image Analyst 2012-9-20
编辑：Image Analyst 2012-9-20
So you DID get a gray scale image. Why did you say you did not?

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