Text recognition crnn (#176)

* rcnn only for EN

* review 1

* add readme.md

* rename file

* review 2

* review 3

* option v

* review 4

Author: LaurentBerger

models/text_recognition_crnn/CMakeLists.txt

@@ -0,0 +1,29 @@
+cmake_minimum_required(VERSION 3.24)
+set(project_name "opencv_zoo_text_recognition_crnn")
+
+PROJECT (${project_name})
+
+set(OPENCV_VERSION "4.7.0")
+set(OPENCV_INSTALLATION_PATH "" CACHE PATH "Where to look for OpenCV installation")
+find_package(OpenCV ${OPENCV_VERSION} REQUIRED HINTS ${OPENCV_INSTALLATION_PATH})
+# Find OpenCV, you may need to set OpenCV_DIR variable
+# to the absolute path to the directory containing OpenCVConfig.cmake file
+# via the command line or GUI
+
+file(GLOB SourceFile
+    "demo.cpp")
+# If the package has been found, several variables will
+# be set, you can find the full list with descriptions
+# in the OpenCVConfig.cmake file.
+# Print some message showing some of them
+message(STATUS "OpenCV library status:")
+message(STATUS "    config: ${OpenCV_DIR}")
+message(STATUS "    version: ${OpenCV_VERSION}")
+message(STATUS "    libraries: ${OpenCV_LIBS}")
+message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
+
+# Declare the executable target built from your sources
+add_executable(${project_name} ${SourceFile})
+
+# Link your application with OpenCV libraries
+target_link_libraries(${project_name} PRIVATE ${OpenCV_LIBS})

models/text_recognition_crnn/README.md

@@ -36,6 +36,8 @@ Note:
   - Try `text_recognition_CRNN_CH_2021sep.onnx` with `charset_94_CH.txt`
   - Try `text_recognition_CRNN_CN_2021sep.onnx` with `charset_3944_CN.txt`.
 
+### Python
+
 Run the demo detecting English:
 
 ```shell
@@ -52,13 +54,38 @@ Run the demo detecting Chinese:
 
 ```shell
 # detect on camera input
-python demo.py --model text_recognition_CRNN_CN_2021nov.onnx --charset charset_3944_CN.txt
+python demo.py --model text_recognition_CRNN_CN_2021nov.onnx
 # detect on an image
-python demo.py --input /path/to/image --model text_recognition_CRNN_CN_2021nov.onnx --charset charset_3944_CN.txt
+python demo.py --input /path/to/image --model text_recognition_CRNN_CN_2021nov.onnx
 
 # get help regarding various parameters
 python demo.py --help
 ```
+### C++
+
+Install latest OpenCV and CMake >= 3.24.0 to get started with:
+
+```shell
+# detect on camera input
+./build/opencv_zoo_text_recognition_crnn 
+# detect on an image
+./build/opencv_zoo_text_recognition_crnn --input /path/to/image -v
+
+# get help regarding various parameters
+./build/opencv_zoo_text_recognition_crnn --help
+```
+
+Run the demo detecting Chinese:
+
+```shell
+# detect on camera input
+./build/opencv_zoo_text_recognition_crnn  --model=text_recognition_CRNN_CN_2021nov.onnx --charset=charset_3944_CN.txt
+# detect on an image
+./build/opencv_zoo_text_recognition_crnn  --input=/path/to/image --model=text_recognition_CRNN_CN_2021nov.onnx --charset=charset_3944_CN.txt
+
+# get help regarding various parameters
+./build/opencv_zoo_text_recognition_crnn  --help
+
 
 ### Examples