MATLAB: Color array to grayscale, images

image

I have two jpg images that I need to store as matrices of doubles then convert their color arrays into grayscale matrices. how would I do that?

*I attached the photos in a zip file

Best Answer

% Read the image
img1 = imread('photo1.jpg');
% Convert it to double
img1Double = im2double(img1);
% Convert from RGB to grayscale
img1Gray = rgb2gray(img1);
% Display the results
figure
imshowpair(img1, img1Gray, 'montage')

You can do the same for 'photo2.jpg'

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MATLAB: Overlay binary image on RGB image

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

MATLAB: Gray2rgb conversion

temp = YourGrayImage;
if isfloat(temp)
  temp = im2uint8(temp);
end
ColorImage = ind2rgb(temp, TheColorMapToUse);

Best Answer

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MATLAB: Gray2rgb conversion

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