Tesseract是一个开源的OCR引擎,支持多国语言,其官方地址:https://github.com/tesseract-ocr/tesseract
文档地址:https://tesseract-ocr.github.io/docs/
1.MAC下安装Tesseract
命令安装brew install --with-training-tools tesseract,现在提示 Error: invalid option: --with-training-tools,没有--with-training-tools参数,想把训练工具training-tools一起安装了,最后采用编译的方式安装
# Packages which are always needed.
brew install automake autoconf libtool
brew install pkgconfig
brew install icu4c
brew install leptonica
# Packages required for training tools.
brew install pango
# Optional packages for extra features.
brew install libarchive
# Optional package for builds using g++.
brew install gcc
git clone https://github.com/tesseract-ocr/tesseract/
cd tesseract
./autogen.sh
mkdir build
cd build
# Optionally add CXX=g++-8 to the configure command if you really want to use a different compiler.
../configure PKG_CONFIG_PATH=/usr/local/opt/icu4c/lib/pkgconfig:/usr/local/opt/libarchive/lib/pkgconfig:/usr/local/opt/libffi/lib/pkgconfig
make -j
# Optionally install Tesseract.
sudo make install
# Optionally build and install training tools.
make training
sudo make training-install
之后下载语言包
下载.traineddata文件 并且拷贝到tessdata文件夹下。
具体语言包地址:https://github.com/tesseract-ocr/tessdata
都执行完后,可以控制台执行命令看一下识别的结果:tesseract 111.jpg stdout
安装参考文章:https://www.freesion.com/article/1345377723/
2.Java语言识别,tess4j开发OCR识别
引入tess4j的maven依赖
net.sourceforge.tess4j
tess4j
4.5.1
执行识别demo代码:
public class Tess4jOcrTest {
public static void main(String[] args) {
String bath = "/Users/seapeak/Desktop/";
test1(bath + "555.jpg");
}
/**
* 根据路径识别文字结果
* @param path
*/
public static void test1(String path) {
File file = new File(path);
ITesseract it = new Tesseract();
// 如果没有改变tessdata目录位置请输入.
// it.setDatapath(".");
// // 如果变更过tessdata目录请指定位置
it.setDatapath("/Users/seapeak/Desktop/it/java/tesseract/tessdata/");
//如果是汉字居多设置语言,如果字符偏多设置eng
it.setLanguage("chi_sim");
try {
String result = it.doOCR(file);
log.info("识别结果:"+result );
} catch (TesseractException e) {
// TODO Auto-generated catch block
e.printStackTrace();
log.error("Tess4jOcrTest TesseractException:{}",e);
}
}
}
执行时如果如下未找到language的错误,则设置setDatapath的tessdata目录
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language 'eng'
参考文档:https://blog.csdn.net/chenhailonghp/article/details/102704842
3.training-tools 训练工具 的使用,待续
可以参考:
https://blog.csdn.net/guanzhen3657/article/details/81138868?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase
https://blog.csdn.net/dcrmg/article/details/53677739
https://www.freesion.com/article/1345377723/
https://blog.csdn.net/kangshuaibing/category_7973951.html
https://blog.csdn.net/u010670689/article/details/78374623