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2d Gaussian Fit Problem.

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Sorry, I don't have IMAQ. Could you replace your image with a diagram constant of a 2D array?

 

Also, since your data is arranged in a grid, all you need is reshape to a 1D array (the picture array and the function output inside the model), you don't need this advanced coding that also works for scattered xyz data.


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Message 11 of 24
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@altenbach wrote:

Also, since your data is arranged in a grid, all you need is reshape to a 1D array (the picture array and the function output inside the model), you don't need this advanced coding that also works for scattered xyz data.


Here is an old example for this. (read the entire thread to fit for an elliptic peak of arbitrary rotation, see image below)

 


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Message 12 of 24
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Dear 

 

 

I replaced the same image with static 2d array. thanks for your time

 

cheers

 xg

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As I said, you should use code that is optmized for gridded data. There is no reason to do the xyz dance.

 

Here's a quick rewrite of my older code.

 

(simply read your PNG file, wat a few seconds, and it will fit it just fine. For faster fitting, you should take a reasonably sized subset around the peak)

 

 


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And here's how it would look taking a reasonable subset. Much faster! (same model VI as above)

 

 

 


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Message 15 of 24
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Dear  

 

Many thanks for your quick reply and help. I thought of using the subset too.

 

I will need a newer version to read your code. ( my one is 2012 ).

 

very appreciated your time.

xg

 

 

 

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Here's the LabVIEW 2012 version.

 

(EDIT: rezipped and uploaded new version)


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Many thanks

 

 

again, thanks for your help.

 

 

xg  

 

 

 

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I am having trouble extracting your zip file.  It seems corrupt.  Could you please re-upload a new version?

 

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This thread contains 6 zip files. can you tell which one is giving you problems?


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