Brand recognition

2014-03-31
2014-04-02
  • Hi everyone, i'm currently trying to use OpenImaj, for detecting in a picture, a specific brand logo.
    I have followed the Chapter 5(SIFT and feature matching) from the tutorial of OpenImaj and it works well between two detailled pictures but unfortunatly between an simple image like a logo and a picture with the same logo in it, it fail to find it.

    If it's possible to have some tips for changing the example of the tutorial for finding a simple logo? (I have tested with the both pictures attached)

    Thanks for your help.

    William

     
    Last edit: William Mauduit 2014-03-31
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    • Hey William,

      Thanks for telling us about cool things you’re doing with OpenIMAJ
      Regarding brands, it’s something we’ve tried before with DoG SIFT but with not so great results.
      The issue is that while the logos look super clear to us, they might often not have that many striking and notable corners which the DoG detector tries to find and describe using SIFT.

      Another approach might be the use of MSER to detect the key points and SIFT to describe them.
      This is something we think should work in theory though its practical implementation in openimaj might be trickier…
      Doable, but some code might have to be written

      Another option is the IPD detector, which has been implemented with a SIFT descriptor in the IPDSIFTEngine. This detector might do better than the simple corners in DoG sift because it tries to build in the notion of affine invariance etc.

      Another choice might be the use of templates. There are various template matchers implemented in openimaj, but using these on any sort of scale might be un-reasonably expensive. Have a play with: TemplateMatcher

      let us know how it goes

      Hi everyone, i'm currently trying to use OpenImaj, for detecting in a picture, a specific brand logo.
      I have followed the Chapter 5(SIFT and feature matching) from the tutorial of OpenImaj and it works well between two detailled pictures but unfortunatly between an simple image like a logo and a picture with the same logo in it, it fail to find it.

      If it's possible to have some tips for changing the example of the tutorial for finding a simple logo?

      Thanks for your help.

      William

      Brand recognition

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