Cylinder Qr Code Retifier Demo Example

This is my graduate project. Although I don't think it's useful, it's still a good learning material for OPENCV.

This project try to retify the qr code on cylinder surface, so that normal scanner could recognize the distorted qr code. However, there are still many problems here. I may fix them in the future.

System: Ubuntu 16.04

Building Step:

sudo apt install -y qt5-default qtcreator cmake cmake-gui
sudo apt install -y build-essential libgtk2.0-dev libavcodec-dev
sudo apt install -y libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev

cd cylinder_qrcode/opencv
tar -Jxvf opencv-3.4.1.tar.xz -C .
mkdir opencv_build
cd opencv_build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ../opencv-3.4.1

make -j4
sudo make install

Then the opencv3 and qt5 would be installed in your system successfully. After installing the requirements, cd to the source directory to build the source code:

cd cylinder_qrcode/src
qmake
make
./cylinder

You would see the following simple qt GUI now:

Click Browse to select qr code picture in cylinder_qrcode/datas, and press run, then the result may be:

The result picture may not seen to be great sometimes, so you may need to change the following parameters to get better result:

• Blur Block Size
• Thresh Block Size
• Thresh Block Delta

Detail documentation could be found in: https://gitee.com/fsfzp888/cylinder_qrcode/tree/master/docs