前言
Tesseract 是世界上最知名、应用最广泛的开源 OCR 引擎。它由 Google 积极维护,功能强大,支持多种语言和平台。虽然它在处理理想条件下的印刷文本时表现出色,但其精度会受到图像质量和复杂性的影响。它通常作为核心引擎被集成到各种应用程序、脚本和更大型的系统中,是许多需要文本提取功能的项目的首选开源解决方案。
一、安装 tesseract (OCR)
安装链接:Index of /tesseract (uni-mannheim.de)
二、下载训练数据
通过网盘分享的文件:tessdata各语言集合包.zip
链接: https://pan.baidu.com/s/13oPR2r7qOE6lt6SgbpWOQA 提取码: uaaw
三、创建springboot项目
1、导入依赖
- <dependency>
- <groupId>net.sourceforge.tess4j</groupId>
- tess4j</artifactId>
- <version>5.3.0</version>
- </dependency>
复制代码 2、编写配置类
- package com.songwp.config;
- import net.sourceforge.tess4j.Tesseract;
- import org.springframework.beans.factory.annotation.Value;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.Configuration;
- /**
- * @ClassName:TesseractOcrConfig
- * @Description: ocr配置类
- * @Author: songwp
- * @Date: 2025/6/29 19:24
- */
- @Configuration
- public class TesseractOcrConfig {
- @Value("${tess4j.data-path}")
- private String dataPath;
- @Value("${tess4j.language}")
- private String language;
- @Bean
- public Tesseract tesseract() {
- Tesseract tesseract = new Tesseract();
- // 设置训练数据文件夹路径
- tesseract.setDatapath(dataPath);
- // 设置为中文简体
- tesseract.setLanguage(language);
- return tesseract;
- }
- }
复制代码 3、编写controller
- package com.songwp.controller;
- import com.songwp.service.OcrService;
- import lombok.extern.slf4j.Slf4j;
- import net.sourceforge.tess4j.TesseractException;
- import org.springframework.http.MediaType;
- import org.springframework.web.bind.annotation.PostMapping;
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RequestParam;
- import org.springframework.web.bind.annotation.RestController;
- import org.springframework.web.multipart.MultipartFile;
- import java.io.IOException;
- /**
- * @ClassName:OcrController
- * @Description: ocr识别controller
- * @Author: songwp
- * @Date: 2025/6/29 18:40
- */
- @RestController
- @RequestMapping("/ocr")
- @Slf4j
- public class OcrController {
- private final OcrService ocrService;
- public OcrController(OcrService ocrService) {
- this.ocrService = ocrService;
- }
- @PostMapping(value = "/recognize", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
- public String recognizeImage(@RequestParam("file") MultipartFile file) throws TesseractException, IOException {
- log.info(ocrService.recognizeText(file));
- // 调用OcrService中的方法进行文字识别
- return ocrService.recognizeText(file);
- }
- }
复制代码 5、编写service
- package com.songwp.service;
- import net.sourceforge.tess4j.TesseractException;
- import org.springframework.web.multipart.MultipartFile;
- import java.io.IOException;
- /**
- * @ClassName:OcrService
- * @Description: ocr识别接口
- * @Author: songwp
- * @Date: 2025/6/29 19:27
- */
- public interface OcrService {
- public String recognizeText(MultipartFile imageFile) throws IOException, TesseractException;
- }
复制代码 5、编写service实现类
- package com.songwp.service.impl;
- import com.songwp.service.OcrService;
- import net.sourceforge.tess4j.Tesseract;
- import net.sourceforge.tess4j.TesseractException;
- import org.springframework.stereotype.Service;
- import org.springframework.web.multipart.MultipartFile;
- import javax.imageio.ImageIO;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- /**
- * @ClassName:OcrServiceImpl
- * @Description: ocr识别实现类
- * @Author: songwp
- * @Date: 2025/6/29 19:28
- */
- @Service
- public class OcrServiceImpl implements OcrService {
- private final Tesseract tesseract;
- public OcrServiceImpl(Tesseract tesseract) {
- this.tesseract = tesseract;
- }
- /**
- *
- * @param imageFile 要识别的图片
- * @return
- */
- @Override
- public String recognizeText(MultipartFile imageFile) throws IOException, TesseractException {
- // 转换
- InputStream sbs = new ByteArrayInputStream(imageFile.getBytes());
- BufferedImage bufferedImage = ImageIO.read(sbs);
- // 对图片进行文字识别
- return tesseract.doOCR(bufferedImage);
- }
- }
复制代码 6、运行调试
注:图片颜色比较多的时候有有点识别不清楚了以及一些带字体的文本
参考链接:Spring Boot 集成 tess4j 实现图片识别文本_springboot tesseract-CSDN博客
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