Binarizing an image using mean gray value

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eman
eman 2013-9-11
Hi, I need to binarizing an image according to mean gray value.
The image i'm working in is the Y (Luiminance) Channel of YCbCr color space.
the function im2bw takes grayscale, so I need to convert the image to gray scale( I don't know how to do that because of working on Y channel of YCbCr image) OR getting another procedure.
The Code:
m1 = imread('car1.jpg');
m2 = rgb2ycbcr(m1); sample1=m2(:,:,1);
sample1_mean = mean(mean(sample1))
%Binarizing samples area
BINsample1 = im2bw(sample1, sample1_mean);
I hope if any one can help me.
Thanks in advance,
Eman

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采纳的回答

Tallha Akram
Tallha Akram 2013-9-11
m1 = imread('peppers.png');
m2 = im2double(rgb2ycbcr(m1)); sample1=m2(:,:,1);
sample1_mean = mean(mean(sample1))
%Binarizing samples area
BINsample1 = im2bw(sample1, sample1_mean);
imshow(BINsample1);

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