detect card by opencv
detect card by opencv #make requirements.txt [root@localhost ~]# vi requirements.txt imutils==0.5.3 opencv-python==4.1.0.25 numpy==1.16.4 #download offline install files [root@localhost python]# pip3 download -r requirements.txt Collecting imutils==0.5.3 (from -r requirements.txt (line 1)) Using cached https://files.pythonhosted.org/packages/b5/94/46dcae8c061e28be31bcaa55c560cb30ee9403c9a4bb2659768ec1b9eb7d/imutils-0.5.3.tar.gz Saved ./imutils-0.5.3.tar.gz Collecting opencv-python==4.1.0.25 (from -r requirements.txt (line 2)) Using cached https://files.pythonhosted.org/packages/7b/d2/a2dbf83d4553ca6b3701d91d75e42fe50aea97acdc00652dca515749fb5d/opencv_python-4.1.0.25-cp36-cp36m-manylinux1_x86_64.whl Saved ./opencv_python-4.1.0.25-cp36-cp36m-manylinux1_x86_64.whl Collecting numpy==1.16.4 (from -r requirements.txt (line 3)) Using cached https://files.pythonhosted.org/packages/87/2d/e4656149cbadd3a8a0369fcd1a9c7d61cc7b87b3903b85389c70c989a696/numpy-1.16.4-cp36-c