c++ opencv与Tesseract文字提取
使用Tesseract文字提取之前，我们可以先使用opencv处理一下图片。最简单的例子如下所示：
//识别
void _characterIdentify()
{
string path = "C:/Users/Desktop/11/9.jpg";
Mat img = imread(path);
cv::Mat gray, binary;
// 转换为灰度图像
cv::cvtColor(img, gray, cv::COLOR_BGR2GRAY);
cv::threshold(gray, binary, 0, 255, cv::THRESH_BINARY | cv::THRESH_OTSU);
// 反转二进制图像，得到文字区域
cv::bitwise_not(binary, binary);
//imshow("binary", binary);
//waitKey(0);
tesseract::TessBaseAPI ocr;
int ret = ocr.Init("E:\\qt\\Project\\TesseractSample\\Debug\\tessdata", "chi_sim");
ocr.SetImage(binary.data, binary.cols, binary.rows, 1, binary.step1());
char* outText = ocr.GetUTF8Text();
std::string strrrr = Coding::UTF8ToGB2312(outText);
std::cout << strrrr;
delete[] outText;
ocr.End();
}