How to plot a Gaussian 2d of grayscale image

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Alan David
Alan David 2020-11-11
评论： Ameer Hamza 2020-11-11
I'm beginner in Matlab programming and I'm try to find a peak in grayscale image using gaussian fit.
I was trying this function: https://www.mathworks.com/matlabcentral/fileexchange/55033-fit-1d-and-2d-gaussian-to-noisy-data
but no luck; Is there any preprocessing image before applying this function.

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回答（1 个）

Ameer Hamza
Ameer Hamza 2020-11-11
编辑：Ameer Hamza 2020-11-11
If you directly want to create an image matrix, the try something like this
[X, Y] = meshgrid(-3:0.01:3);
Z = exp(-X.^2-Y.^2);
Z = rescale(Z, 0, 1);
imshow(Z)
  2 个评论
Alan David
Alan David 2020-11-11
Thanks Ameer,
I have an image already but in the function they mention the input as:
% x0 = [Amp,x0,wx,y0,wy,theta]: Inital guess parameters.
% x = [Amp,x0,wx,y0,wy,theta]: simulated gaussian parameters.
how to get these parameters from my image?

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