Getting wrong value of sum
2 views (last 30 days)
Show older comments
I am writing a code in matlab and dealing with images. I am basically finding the sum of value of each pixel, for this I am using code "sum=0; for i=1:584 for j=1:40 img(i,j) sum=sum+img(i,j) end end" here img(i,j) is any gray-scale image. the problem arises here is that the value of "sum" never accedes from 255. Hence I can't get correct value of sum. Someone please help me in finding correct values of sum
0 Comments
Accepted Answer
Oleg Komarov
on 13 Aug 2011
First of all don't use sum as a variable since it's a MATLAB function, next time you try to call the function it will be obfuscated by your variable.
Second img is a uint8 class which cannot store more than 256 values (zero included):
intmax('uint8')
Do the following
out = sum(double(img(:)))
Note that I am using the function sum to perform the summation and assignin the value to something else but any MATLAB function named variable.
More Answers (0)
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!