README.md

Double game

A program to find the common element on the double's game

How to use

You need the non free algorithms of openCV, so I compile it from source with this command:

cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D OPENCV_GENERATE_PKGCONFIG=ON \
      -D OPENCV_ENABLE_NONFREE=ON \
      -D OPENCV_EXTRA_MODULES_PATH=~/opencv_src/opencv_contrib/modules ../opencv

Test the detection of the common element:

python3 doublegame.py test/card_06.png

You will obtain something like this:

How it works

• Read image
• Transform into grayscale
• Detect the cards (circles)
  • Apply a blur to improve the HoughCircles detection
• Extract the cards for an image without background
• Apply a threshold for the contours detection
• Make a FLANN matching between each card to find the macthing points
• For each match, retrieve the corresponding contour to draw the bounding rect