MATLAB: Overlay binary image on RGB image

image processing

I would like to overlay the white regions of a binary image onto an RGB image. Is this possible? What about overlaying the black regions?

Best Answer

Is this?

RGB_image=imread('image_test.jpg');
subplot(311);imshow(RGB_image);
bw_image=im2bw(rgb2gray(RGB_image));
subplot(312);imshow(bw_image);
result=imfuse(RGB_image,bw_image);
subplot(313);imshow(result);

Detail documentation here

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http://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

MATLAB: Create image from overlay

One way is just to print the figure window after you have overlayed both images using your code

mshow(screen); %screen is the background image
hold on
OverlayImage = imshow( trmp ); %trmp is the density field
caxis auto  
colormap( OverlayImage.Parent, jet );
colorbar( OverlayImage.Parent );
rslt=set(OverlayImage, 'AlphaData', 0.4 );
print -djpeg filename

This will create a JPG image, will you can read using imread function. However, due to JPEG comression, you might not want this solution.

In that case you can try to use imfuse function: https://www.mathworks.com/help/images/ref/imfuse.html

img_overlay = imfuse(screen, trmp);

Best Answer

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MATLAB: Create image from overlay

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