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How do you convert an RGB image to grayscale in matlab using array manipulation. Please dont...

How do you convert an RGB image to grayscale in matlab using array manipulation. Please dont use grayscale function to do this. First you should go to each pixek to get the mean value and set all three layers to that mean value

matlab code please write the simplest and shortest code using array manipulation. And please dont use a function for grayscale

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Answer #1

input image:

output image:

matlab code:

rgbImage = imread('3.PNG');
[rows, columns, numberOfColorChannels] = size(rgbImage);
if(numberOfColorChannels == 3)
% It's color, need to convert it to grayscale.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Do the weighted sum.
grayImage = .299*double(redChannel) + ...
.587*double(greenChannel) + ...
.114*double(blueChannel);
% You probably want to convert it back to uint8 so you can display it.
grayImage = uint8(grayImage);
else
% It's already gray scale.
grayImage = rgbImage; % Input image is not really RGB color.
end
  
imshow(rgbImage)
imshow(grayImage)

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