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i need this equation matlab code any body help me.

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Jan
Jan on 15 Jan 2018
Edited: Jan on 15 Jan 2018
gbar = sum(g(:)) / (M * N);
sigma2 = sum((g(:) - gbar) .^ 2) / (M * N - 1);
Looks straight forward. But what about:
sigma2 = var(g(:))
  1 Comment
Image Analyst
Image Analyst on 15 Jan 2018
and
gBar = mean(g(:)) % Compute mean over all values in the 2-D matrix.

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