how do I randomly assign an effect to image
my code goes something like this: rgbImage = imread ('bunny.png'); %black text image saying "bunny" rgbImage2 = imread ('dragon.png'); %black text image saying dragon theWord = rgbImage; theWord2 = rgbImage2; %% block of code to change the color of bunny image (1) % turn black text image to cyan theWord(:,:,3)=255; theWord(:,:,2)=255; %turn black text to red (2) theWord(:,:,1)=255; theWord(:,:,2)=0; %% repeat for dragon image theWord2(:,:,3)=255; theWord2(:,:,2)=255; theWord2(:,:,1)=255; theWord2(:,:,1) = 0; I want to create a loop using randi where when whatever image is presented, it assigns a random (color) effect to it. I should I go about it so that I can use randi? I am having a hard time since the images I am using are actually a bit more "messy" so because I have to play around with the colors, the actual text block I wrote to change the color is around 5 lines. I just shortened them a bit for simplicity.
John Michell answered .
2025-11-20
Get a mask and then change the colors.
[r, g, b] = imsplit(rgbImage); mask = any(rgbImage, 3) randomColor = floor(255 * rand(1,3)); r(mask) = randomColor(1); g(mask) = randomColor(2); b(mask) = randomColor(3); rgbImage = cat(3, r, b, g); imshow(rgbImage)