CODEWITHSUNDEEP
matlab
SassyCoder
SassyCoder

Reputation: 3

MATLAB - Can someone please just explain what these lines of code do

Hi can someone help me regarding this code, i know that it reads the image and shows the red channel on the histogram for the RGB image (Fruits1).

colourImage = imread('Fruits1.jpg');        //read image  
redHistogram = double(colourImage(:,:,1));  //what does this line do?  
figure, hist(redHistogram(:),124);          //what does this line do?

Upvotes: 0

Views: 53

Answers (1)

Paul Lambert
Paul Lambert

Reputation: 420

redHistogram = double(colourImage(:,:,1));  //what does this line do?

This takes the red plane of the image and converts each pixel intensity from an integer (0-255) to a floating-point value (double). The result is a 2-d array of these values.

figure, hist(redHistogram(:),124);          //what does this line do?

This displays a histogram of the pixel intensities from above, sorted into 124 equal-sized bins.

Upvotes: 1

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