无法使用TesseractOCRConfig Apache Tika提取扫描的pdf [英] Unable to extract scanned pdf using TesseractOCRConfig Apache Tika
问题描述
我的pdf包含扫描图像,我想从中提取文本。
My pdf contains scanned images and I want to extract text from it.
我尝试过:我尝试使用AutoDetectParsers但没有输出。
What I tried : I tried with AutoDetectParsers but no output.
我遵循 Apache Tika提取扫描的PDF文件以及Apache Tika Jira的 https ://issues.apache.org/jira/browse/TIKA-1729 但是没有任何错误就是空字符串。
I followed the solution provided in Apache Tika extract scanned PDF files and also Apache Tika Jira at https://issues.apache.org/jira/browse/TIKA-1729 but getting empty string without any error.
我的配置:Win 7 64-位OS,JDK 1.8.0_45。
My configuration : Win 7 64-bit OS, JDK 1.8.0_45.
欢迎任何形式的帮助。
推荐答案
要解决此问题的步骤:
-
使用系统安装Tesseract用于Windows的'tesseract-ocr-setup-3.05.00dev.exe'来自: https://sourceforge.net/projects/tesseract-ocr-alt/files/ 并在配置中设置其位置。
Install Tesseract in your system using 'tesseract-ocr-setup-3.05.00dev.exe' for Windows from: https://sourceforge.net/projects/tesseract-ocr-alt/files/ and set its location in your config.
Java代码:
Parser parser = new AutoDetectParser();
BodyContentHandler handler = new BodyContentHandler(Integer.MAX_VALUE);
TesseractOCRConfig config = new TesseractOCRConfig();
config.setTesseractPath(tPath);
PDFParserConfig pdfConfig = new PDFParserConfig();
pdfConfig.setExtractInlineImages(true);
pdfConfig.setExtractUniqueInlineImagesOnly(false); // set to false if pdf contains multiple images.
ParseContext parseContext = new ParseContext();
parseContext.set(TesseractOCRConfig.class, config);
parseContext.set(PDFParserConfig.class, pdfConfig);
//need to add this to make sure recursive parsing happens!
parseContext.set(Parser.class, parser);
Maven依赖项:
Maven dependencies :
< dependencies>
< dependency>
< groupId> org.apache.tika< / groupId>
< artifactId> tika-parsers< / artifactId>
< version> 1.13< / version>
< / dependency>
< dependency>
< groupId> com.levigo.jbig2< / groupId>
< artifactId> levigo-jbig2-imageio< / artifactId>
< version> 1.6.5< / version>
< / dependency>
< dependency>
< groupId> com.github.jai-imageio< / groupId>
< artifactId> jai-imageio-core< / artifactId>
< version> 1.3.1< / version>
< / dependency>
< / dependencies>
我认为这可能会有所帮助。谢谢。
I think it may be helpful. Thanks.
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