variance modification for gaussian fitting problem

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Terry McGinnis
Terry McGinnis 2015-6-14
i am trying to implement gaussian fitting for 2D images and am using the code from-
http://in.mathworks.com/matlabcentral/fileexchange/37087-fit-2d-gaussian-function-to-data
made by gero nootz. how can i get rid of the orientation estimation so that the estimated covariance is a scaled identity matrix.I only want to fit a circularly-symmetric Gaussian so that variances along x and y (x-width and y-width in plot) are equal.Can anyone figure this out.
Thanks in advance :)

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