Negentropy?

Would anyone happen to have a Matlab/C Script to calculate Negentropy of an image?

Thank you!

Answer 1

[David Young]

ne = 0.5*log(2*pi*exp(1)*var(Image(:))) - entropy(Image)

- though you might need to worry about the image mean. The formula above is based on the Wikipedia articles on negentropy and the Normal distribution, but if the image mean is non-zero it doesn't seem to work. Perhaps someone else can comment and shed more light on this.

Answer 2

[Aaditya Kalsi]

I think:

Image = Image - mean(Image(:));

should fix it.