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### Normalize hist with Norm_L1 doens't work ?

I am using the normalize function with this params:

normalize(hist, hist, 255, NORM_L1);


This should mean that the sum of every values inside the mat should equal to = 255
But later if i sum all values i get another value

sum(hist) != 255


To fix this error I need to call the normalize function like this:

normalize(hist, hist, 255, 0, NORM_L1);


Now I get:

sum(hist) == 255


Is this an intended behavior ?