Can we measure yarn twist from image with image processing
3 views (last 30 days)
Show older comments
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?
<<
<<
>>
>>
0 Comments
Accepted Answer
Image Analyst
on 18 Jan 2015
Edited: Image Analyst
on 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.
11 Comments
Image Analyst
on 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?
More Answers (0)
See Also
Categories
Find more on Time-Frequency Analysis in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!