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I have a OpenCV project in Android Studio for an app, it uses C++ for the OpenCV processing part and I want to combine it with Tesseract (C++) for text recognition.

I've been searching for info but I don't know where to start or what is the correct way to do it, sorry for not knowing how to explain very well, i'm kinda new using C++ in Android Studio for Mobile Development.

Here is what i want:

#include <jni.h>
#include "opencv2/core.hpp"
#include <opencv2/imgproc.hpp>
#include <fstream>
//need Tesseract and Leptonica libraries
using namespace cv;
using namespace std;

extern "C"
JNIEXPORT void JNICALL Java_com_example_opencv_NativeClass_detect_1letters(JNIEnv *env, jclass clazz, jlong frame) {
    //TODO: OpenCV and Tesseract code
}

Here is my CMakeLists.txt if needed:

cmake_minimum_required(VERSION 3.4.1)

set(CMAKE_VERBOSE_MAKEFILE on)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
include_directories(${CMAKE_SOURCE_DIR}/src/main/jniIncludes)

add_library(native-lib
            SHARED
            src/main/cpp/native-lib.cpp)

add_library(lib_opencv SHARED IMPORTED)

set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)

find_library(log-lib
            log)

target_link_libraries(native-lib ${log-lib} lib_opencv)
haagantos
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  • Not familiar with android studio, but [here](https://stackoverflow.com/questions/62022808/tesseract-always-missing-a-line-in-picture/62099892#62099892) is a helpful solution for c++,opencv and tesseract. – Yunus Temurlenk Jul 23 '20 at 05:54
  • Is not what I was looking for, I edited the question for a better understanding. Thanks anyways – haagantos Jul 24 '20 at 05:35

0 Answers0