data from JPEG

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Cameron Frament
Cameron Frament on 1 Aug 2011
I have a *.jpeg image of a x-y scatter plot (not monotonic), and I would like to extract the data points. Any ideas? I was going to do it manually by pixels, but I figured that there is a good way to do that with linear algebra.
  2 Comments
Ashish Uthama
Ashish Uthama on 1 Aug 2011
Posting the picture might help get a better answer.
LALIT PANKAJ GROVER
LALIT PANKAJ GROVER on 23 Sep 2021
How can I extract the data from this jpeg file. Any suggestion are welcomed.

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Answers (1)

John Barber
John Barber on 1 Aug 2011
The File Exchange program GRABIT is a good way to extract data points from an image of a graph. Download it here: http://www.mathworks.com/matlabcentral/fileexchange/7173
  4 Comments
Image Analyst
Image Analyst on 1 Aug 2011
FFT function ?!?!? Do you know what the FFT is?
I suppose you could use image analysis (thresholding, labeling, regionprops) if your points were well isolated and you had already cropped the axes, tick marks, etc. out of your image. I second Ashish's suggestion.
lakshmi boddu
lakshmi boddu on 3 Apr 2018
Hello sir , can you please help me how to draw a scatter plot for a jpg image

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