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Li yang Ku

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Blog author of the Serious Computer Vision Blog
http://computervisionblog.wordpress.com/

Professional Interests:
Computer Vision

 

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16 Jan 2012 Screenshot Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku computer vision, surf, sift, object recognition 111 16
  • 5.0
5.0 | 4 ratings
22 Apr 2011 Screenshot Match Plot Draw matching lines between corresponding points in two image. Useful for SIFT feature matching. Author: Li yang Ku plot, match, line, sift, surf, corresponding points 47 4
  • 5.0
5.0 | 4 ratings
Comments and Ratings by Li yang View all
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06 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

Yes, it should be able to do this job. Just train it with different QR codes or a QR code with out the middle part.
05 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

Hi Saleh, you should double check you have surfpoints.mexw32 in the same folder which surfpoints.m locates in, and also make sure you added the surfmex directory to path. I believe you didn't install surfmex correctly.
01 Mar 2012 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

Unfortunately this is not a probabilistic method, therefore unlike http://computervisionblog.wordpress.com/2011/12/11/object-recognition/ it doesn't determine an object exist or not base on a probabilistic threshold. However, you should be able to get a degree of confidence based on "length(filter_match)" which is the number of votes remained after filtering. To lower the threshold of finding an object or not, you can modify the parameters I manually set under %check location, %check orientation, %check scale, etc.
17 Feb 2012 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

A pen probably won't work, unless there are words on the pen and you always show the same side of the pen in the test image. Remind that this method uses SIFT like features. SIFT works well on unique patterns with certain size. Some object with a large surface and some special patterns like words will probably work well.
15 Feb 2012 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

The object in both the training image and the testing image has to be big enough, otherwise there wont be enough SURF points to recognize. I recommend to start with the model I provided and then move on to something easy like books with text on the cover. Note that this method would not work well on texture less objects. Let me know if you still have problems.
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06 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku Ku, Li yang

Yes, it should be able to do this job. Just train it with different QR codes or a QR code with out the middle part.
06 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku Saleh

Hi Li yang Ku,
Thank you very much, it is work now.
Do you think this program is applicable to modify to be able to recognize QR-Code? What I need is just detect QR-Code Not read it, which means is this image contains QR-Code or not? I don't need to read it, because I have another program does that job(decoding QR-Code).
Best Regards

05 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku Ku, Li yang

Hi Saleh, you should double check you have surfpoints.mexw32 in the same folder which surfpoints.m locates in, and also make sure you added the surfmex directory to path. I believe you didn't install surfmex correctly.
05 Mar 2013 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku Saleh

Hi Li yang Ku,

At last year I was able to run your program, but now I'm facing this problem:
>> Demo
Attempt to execute SCRIPT surfpoints as a function:
H:\mayPaper\ObjectMatching\surfmex\SURFmex-v2\mexw32\surfpoints.m

Error in createTargetModel (line 18)
[cr, descr, sign, info] = surfpoints(im_mat_g,options);

Error in Demo (line 22)
targetModel = createTargetModel(targetImage, targetModelImage);

Could you help me to fix it? Please...

03 Dec 2012 Match Plot Draw matching lines between corresponding points in two image. Useful for SIFT feature matching. Author: Li yang Ku Judy

Thank you very much!!
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sift, surf, computer vision, corresponding points, image processing
Files Tagged by Li yang View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
16 Jan 2012 Screenshot Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku computer vision, surf, sift, object recognition 111 16
  • 5.0
5.0 | 4 ratings
22 Apr 2011 Screenshot Match Plot Draw matching lines between corresponding points in two image. Useful for SIFT feature matching. Author: Li yang Ku plot, match, line, sift, surf, corresponding points 47 4
  • 5.0
5.0 | 4 ratings

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