[Insight-users] How does ITK covert color image into grayscale image?

[Albert Chitemyan]

Hi all,
   
  As far as I know ITK's most classes are dealing with grayscale images.
  How does ImageFileReader read pixel values from color image?. 
  Does it take only one component(e.g. red) of RGB, or copmute pixel value using those 3 components?(grayscale pixel value = R*a + G*b + B*c).
   
    Thanks.
   
  Albert
   
   


		
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