Python simillar image search
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Python simillar image search

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Python simillar image search Presentation Transcript

  • 1. Similar image search with OpenCV Jernej Virag / @jernejv
  • 2. How does it work?● Preprocess images● Find interesting parts of images ( features)● Find matching features of input image in feature database
  • 3. Preprocessing images● Grayscale conversion● Bluring● Histogram equalization
  • 4. Feature extraction● Hessian feature detector● FAST● Laplacian of Gaussian● etc.● Better algorithms ● SIFT (patented) ● SURF (patented)
  • 5. Feature matching● Fast lookup of nearest vectors● Well use FLANN
  • 6. OpenCV● Great: ● Tons of pre-implemented algorithms ● REALLY fast ● Hardware acceleration support● Less great: ● Annoying compilation ● Broken packages ● Unstable API ● Large
  • 7. OpenCV● Should compile your own!● Add TBB and libeigen for performance● Dont forget python headers!● Use “cmake-gui” to check results of pre-compile configuration
  • 8. CODE TIME!
  • 9. ?@jernejv / mavrik@kiberpipa.org
  • 10. ?@jernejv / mavrik@kiberpipa.org