MATLAB: How to obtain a composite of two grayscale images

Image Processing Toolboximfuse image composite

I want to make a composite of two images with "imfuse" function as follow:

imfuse(A,RA,B,RB,'ColorChannels',[1 2 0])

Is there anyway to make the Colorchannels "off"

Best Answer

Have you tried this:

[C,RC] = imfuse(A,RA,B,RB,'blend');

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MATLAB: Put color to a gray image

gray_as_RGB = repmat(YourGrayImage, [1 1 3]);

now gray_as_RGB is the RGB equivalent of the grayscale image and you can write color information into it.

MATLAB: How to code image types

Try this:

grayImage = imread(fullFileName);
% Get the dimensions of the image.
% numberOfColorChannels should be = 1 for a gray scale image, and 3 for an RGB color image.
[rows, columns, numberOfColorChannels] = size(grayImage);
if numberOfColorChannels > 1
	% It's not really gray scale like we expected - it's color.
	% Use weighted sum of ALL channels to create a gray scale image.
% 	grayImage = rgb2gray(grayImage);
	% ALTERNATE METHOD: Convert it to gray scale by taking only the green channel,
	% which in a typical snapshot will be the least noisy channel.
	grayImage = grayImage(:, :, 1); % Take red channel.
end
if max(grayImage(:)) == 1 && length(unique(grayImage(:))) == 2
    % It's binary because it has only two values: 0 and 1
else
    % It's grayscale
end

You can also use isa(grayImage, 'logical') or similar to identify what class it is.

Best Answer

Related Solutions

MATLAB: Put color to a gray image

MATLAB: How to code image types

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