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Fit a plane to 3D data from image

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Jonathan Avesar
Jonathan Avesar 2019-8-23
评论： Jonathan Avesar 2019-8-23
Hello,
I have an image, I, where
>> whos I
Name Size Bytes Class Attributes
I 2056x2464 5065984 uint8
I plotted the surface using surf:
surf(double(I))
which displays this:
surf.png
Now I would like to fit this surface to a plane. So I think I need to use something like
fit([x, y], z, 'ax+by+c')
but I can't figure out how to format the x,y,z input data using my image. Does anyone know how to do this?
Thanks,

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采纳的回答

darova
darova 2019-8-23
You have to form vectors of x,y,z the same size. Also i suggest you to reduce your data
[m,n] = size(I);
[X,Y] = meshgrid(1:m,1:n);
% get every 10 000th point
X = X(1:1e4:end)';
Y = Y(1:1e4:end)';
Z = I(1:1e4:end)';
F = fit([X,Y],Z,fittype);
  1 个评论
Jonathan Avesar
Jonathan Avesar 2019-8-23
I understand, thank you so much! Yeah the size of the data there is unnecessary.

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