cvNet = cv.dnn.readNetFromTensorflow('ctpn.pb', 'protobuf.pbtxt')
cv2.error: OpenCV(4.1.1) C:\projects\opencv-python\opencv\modules\dnn\src\tensorflow\tf_io.cpp:54: error: (-2:Unspecified error) FAILED: ReadProtoFromTextFile(param_file, param). Failed to parse GraphDef file: protobuf.pbtxt in function 'cv::dnn::ReadTFNetParamsFromTextFileOrDie'

Does anyone have any idea how I can solve this pr

Hi,
There is a typo in readme - demo section (should be _ rather than -)
is:
python3 run_demo_server.py --checkpoint-path /tmp/east_icdar2015_resnet_v1_50_rbox/
and should be:
python3 run_demo_server.py --checkpoint_path /tmp/east_icdar2015_resnet_v1_50_rbox/

also i had to change:
/tmp/east_icdar2015_resnet_v1_50_rbox/
into:
tmp/east_icdar2015_resnet_v1_50_rbox/

I think we should add a paper which is named "Detecting Text in Natural Scenes with
Stroke Width Transform",although,it is very early,lots of classical papers mention it.
address:https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/201020CVPR20TextDetection.pdf