how to scan image for specific pattern
조회 수: 19 (최근 30일)
이전 댓글 표시
답변 (2개)
Anand
2013년 10월 28일
You can try something like this:
%the pattern you're looking for is B W B B B W B
template = logical([0 1 0 0 0 1 0]);
%find NCC of template with image BW
cc = normxcorr2(template,BW);
Then find peaks in cc to locate co-ordinates of the pattern.
댓글 수: 2
Image Analyst
2013년 10월 28일
편집: Image Analyst
2013년 10월 28일
I thought of that first also but then I realized that it wouldn't work if the QR bar code in the image isn't the same size and pattern as the pattern he's searching for. I believe he wants to locate any QR code, not just some code of a pattern and size that is known in advance. So if he can't specify in advance what to look for then he'll have to look to texture segmentation. Or else search the literature for papers like I mentioned in my comment.
Anand
2013년 10월 28일
Yes, I agree. Bur since genesis mentioned that the scale specifically as 1:1:3:1:1 "pixels" I thought he might know more about his image data.
Image Analyst
2013년 10월 28일
Try using stdfilt() to look for areas of high texture in the image.
댓글 수: 1
Image Analyst
2013년 10월 28일
You might try this:
Kato, Y.[Yuji], Deguchi, D.[Daisuke], Takahashi, T.[Tomokazu], Ide, I.[Ichiro], Murase, H.[Hiroshi], Low Resolution QR-Code Recognition by Applying Super-Resolution Using the Property of QR-Codes, ICDAR11(992-996).
By the way, if you do want to play around with normxcorr2 (which probably won't work in your situation) you can try the demo I attached below.
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!