white contour on top of grayscale image

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Is there a method for changing the colorscale of your figure to grayscale without using the colormap('gray') option. I have an image which I want to publish in grayscale but I want to add a white contour plot on top of the image, by changing the image to grayscale it also changes the color of the contour to black, which I originally specified as white. Is there a method for working around this?

Accepted Answer

Walter Roberson
Walter Roberson on 12 Sep 2012
See the MATLAB File Exchange contribution "freezeColors"

More Answers (1)

Image Analyst
Image Analyst on 12 Sep 2012
Did you try converting your image to grayscale using rgb2gray()? And then use export_fig() to save your image, after you've put contours or other graphics and annotation atop of it?

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