Customizing the color channels for fusing two images in

Hi

I have these two 2DFFT images (DSC_3675.pngFFT and DSC_4062.pngFFT). I have to superimpose them for comparison purpose, but when I amd doing it using imfuse or cat I am getting something like 'superimposed'. I want the two plos to be displayed on white background with two distinct colour (such as blue and red etc.)

Thank You

Answer 1

[DGM]

This is a basic image blending operation. As such, I am going to elect to do this with MIMT tools instead of native MATLAB/IPT. MIMT is available on the File Exchange:

https://www.mathworks.com/matlabcentral/fileexchange/53786-image-manipulation-toolbox

This will give you an image where the dark areas of the two images are represented as the specified colors against a white background:

A = imread('DSC_3675.pngFFT.png');
B = imread('DSC_4062.pngFFT.png');

colorA = [255 0 0];
colorB = [0 0 255];

s = imsize(A);
if any(s ~= imsize(B))
    warning('image sizes don''t match; padding')
    % adjust gravity to control colocation of images
    S = imstacker({A,B},'gravity','center','padding',[1 1 1]);
    A = S(:,:,:,1);
    B = S(:,:,:,2);
    s = imsize(A);
    clear S
end

% generate colored underlays
cpA = colorpict(s,colorA,'uint8');
cpB = colorpict(s,colorB,'uint8');

% colorize images
A = imblend(A,cpA,1,'screen');
B = imblend(B,cpB,1,'screen');

% combine colorized images
C = imblend(A,B,1,'multiply');

imshow(C)

If you want specified colors on a black background:

A = imread('DSC_3675.pngFFT.png');
B = imread('DSC_4062.pngFFT.png');

colorA = [255 128 0];
colorB = [0 128 255];

s = imsize(A);
if any(s ~= imsize(B))
    warning('image sizes don''t match; padding')
    % adjust gravity to control colocation of images
    S = imstacker({A,B},'gravity','center','padding',[1 1 1]);
    A = S(:,:,:,1);
    B = S(:,:,:,2);
    s = imsize(A);
end

% generate colored underlays
cpA = colorpict(s,colorA,'uint8');
cpB = colorpict(s,colorB,'uint8');

% colorize images
A = imblend(imcomplement(A),cpA,1,'multiply');
B = imblend(imcomplement(B),cpB,1,'multiply');

% combine colorized images
C = imblend(A,B,1,'screen');

imshow(C)

As you can tell by this awful white website background, the readability of any image depends on its surroundings.

[Prabhat Srivastava]

Yes, this is exactly what I needed.

Thank you.