How can I Change grayscale color?

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?

Answer 1

[Walter Roberson]

cmap = pink(256);                %pink!
cmap(1,:) = [1.0 1.0 1.0];       %replace first entry with white

colormap(cmap)

[saleh Alghamdi]

Thank you for your response. but could you give me an example with full code please.

[Walter Roberson]

   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.

[saleh Alghamdi]

much appreciated.