Mac安装Tesseract，使用Tess4j实现OCR识别

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

<!-- https://mvnrepository.com/artifact/net.sourceforge.tess4j/tess4j -->
<dependency>
    <groupId>net.sourceforge.tess4j</groupId>
    <artifactId>tess4j</artifactId>
    <version>4.5.1</version>
</dependency>

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