How we can get the pixel values of an object in an image in matlab??
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Image Analyst on 29 Aug 2015
Since you posted this as a brand new question, and left out any context, you've confused the other people that answered. That's why you should have asked this in your original question where I gave you the answer: http://www.mathworks.com/matlabcentral/answers/233509#answer_189277 The answer is "maxDistance" which is in the code that actually created that red line you're showing above. Go back to your original question to see.
JangHo Cho on 24 Aug 2015
Let's say your picture has 300 x 150 pixels and RGB color. you can read the image by using imread() function
image = imread('your_pic.jpg'); and you can see the size of image by size(image). It will be 150 x 300 x 3 uint8 array. The array has 3 planes of colors RGB. You can find out what is the red color plane by imshow(image(:,:,1)) imshow(image(:,:,2)) imshow(image(:,:,3)) Now you know which plane is red color. Check the values of the pixels of the plane. if a pixel has values in red plane and there are zero values in other plane, the pixel is red. right? Maybe you should use for loop.