Mean pixel value

I need to find the mean pixel value ( mean intensity) of the entire image which is a slice obtained from CT. I have trouble when the function regionprops is used since I need to account for the entire image and not only a certain region. Is there any other function that can be used?

Thanks,

Answer 1

[Walter Roberson]

mean(TheImage(:))

Answer 2

[Swapnil Kelkar]

Thanks so much!!

[Ishtiaq Bercha]

I have a similar problem. I am looking at a medical image but I want to discard the black background and look at the image in the display window. I am thinking about using a nested for loop for this purpose. However I am not sure how to determine pixel value of indiviual pixels. Here is what my code so far looks like.

for m = 1:x

for n= 1:256

if z = impixelinfo(m,n) >=1

A(m,n) = z

else continue

end

end

end

However I am getting an error on the line that determines the pixel value.

That is"if z = impixelinfo(m,n) >=1"

I will appreciate some tips.

Thanks

---Ish

[Walter Roberson]

Please start a new Question for this issue.