Can we measure yarn twist from image with image processing
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Hi Everyone.
Can we measure number of yarn twist from picture.
For example in picture one yarn twist number with is shown with red arrow 7 or 8. We can see thick place is yarn twist. Can we write a code for this? Or it isnt possible?
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Image Analyst
le 18 Jan 2015
Modifié(e) : Image Analyst
le 18 Jan 2015
It's possible. First I'd call imopen() to get rid of the stray threads.
grayImage = imopen(grayImage, true(9));
binaryImage = grayImage > 128; % or whatever.
Then extract the biggest remaining blob using the attached function. Then I'd get the x,y coordinates of the edges of the main, bulk yarn.
boundaries = bwboundaries(binaryImage');
Be sure to split out the two different sides of the yarn. Then call fft() or pwelch() to get the dominant spatial frequency. Give it a try. If you need to come back, then attach the original image plus your attempt at coding up my suggestions.
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Image Analyst
le 19 Jan 2015
No, I meant, like is it for your senior project, or your Masters thesis, or Ph.D. dissertation, or has your company or university been contracted to develop a turnkey system by a textile manufacturer?
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