how to find average pixels value from matrix 3*3

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asthana
asthana 2014-5-4
回答： Youssef Khmou 2014-5-4
hello i have the 3*3 matrix now i want to find the average value of it. the image is in gray color. so how to do same...

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回答（2 个）

Image Analyst
Image Analyst 2014-5-4
For one array:
meanValue = mean2(array3by3);
To do it for every pixel in an entire image:
meanImage = imfilter(grayImage, ones(3)/9);
This produces an output image where every pixel is the average of the 9 pixels at the same location in the input image.
Youssef Khmou
Youssef Khmou 2014-5-4
try :
H=mean(M(:));

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