curve fitting of an image

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Ali Jarekji
Ali Jarekji on 4 Jan 2022
Commented: DGM on 13 Sep 2023
I have this image which i changed to binary. I want to write a code that draws a fitting curve into the points shown in the figure attached. How can I do that?
  4 Comments
Image Analyst
Image Analyst on 4 Jan 2022
It would be better to attach the original image, not the segmented image. Looks like your segmentation algorithm is not so good. Also post another image where you've painted the curve over the original gray scale image so we can see what you're trying to find.
Finally, say WHY it's the curve that you think you need to find, and if you actually had a list of (x,y) coordinates of the curve, what would you do with that information.

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Answers (1)

VINAYAK LUHA
VINAYAK LUHA on 13 Sep 2023
Hi Ali,
I understand that you wish to know about how to fit a curve to the points in a binarized image.
Follow the steps mentioned below in order to achieve that:
  1. Find the connected components in the binarized image using "bwconncomp" function.
  2. Convert the "PixelIdxList" in each found connected component to [x, y] data using the “ind2sub” function.
  3. Fit a polynomial degree curve to the data using the “fit” function.
  4. Display the original image using “imshowfunction.
  5. Plot the fitted curves on top of the image.
Hope this helps.
Regards,
Vinayak Luha
  1 Comment
DGM
DGM on 13 Sep 2023
Can you provide an example applying these steps to the given image?

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