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How can I Change grayscale color?

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saleh Alghamdi
saleh Alghamdi 2017-2-6
评论： saleh Alghamdi 2017-2-12
Hi Guys,
I have an image at the grayscale color and black background and I want to change the black background to white color and change the gray scale to pink scale that depends on concentration of color.
Can anyone tell me how I can do that?

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Walter Roberson
Walter Roberson 2017-2-6
cmap = pink(256); %pink!
cmap(1,:) = [1.0 1.0 1.0]; %replace first entry with white
colormap(cmap)
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Walter Roberson
Walter Roberson 2017-2-6
sample_plot = sort( randi([0 255], 64, 80, 'uint8') ); %sample grayscale data
cmap = pink(256); %pink!
cmap(1,:) = [1.0 1.0 1.0]; %replace first entry with white
Then
image(sample_plot)
colormap(cmap)
or
imshow(sample_plot, cmap)
The white blocks that show up against the top edge are places where the background values of 0 have been drawn as white as you requested.

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