MATLAB: Switching between black/white and color

colorMATLABplot

Is there a simple switch that can convert the output plot between black/white and color?

A file containing many plot commands results in a single plot. I can modify each plot command to make it b/w but is there a wholesale simple way of converting all plots to b/w?

Best Answer

No.

However, you could probably adapt the freezeColors File Exchange contribution so that instead of replacing mapped and pseudocolor graphics with the corresponding rgb graphics, that it did rgb2gray and repmat that along the third dimension to get a gray rgb color.

Related Solutions

MATLAB: How to create a black image

Can you use imshow?

If you have to use imagesc, keep in mind that an image has to have values for R, G and B for each pixel. That means you matrix needs to be 256x64x3.

Try using imagesc with this

img=zeros(256,64,3,'uint8');

MATLAB: Black and white image

Try this

[counts, grayLevels] = imhist(grayImage, 256);
if sum(counts(2:end-1)) > 0
  % It's not pure black and white
end
% Get map of non-0 and non-255 pixels
grayPixels = grayImage > 0 & grayImage < 255;
% Get pure black and white image
bw = grayImage; % Initialize

bw(grayPixels) = 0; % Zero out any gray pixels.
% Get gray pixels only
grayOnly = grayImage; % Initialize
grayOnly(~grayPixels) = 0; % Zero out any pure 0 or pure 255 pixels.

Best Answer

Related Solutions

MATLAB: How to create a black image

MATLAB: Black and white image

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