Eric, Are you talking about the different OCR strategies for PDFs? The challenge that it really isn't simple.
I've tried to explain it: https://cwiki.apache.org/confluence/display/TIKA/TikaOCR and better, here, with the 2 primary strategies: https://cwiki.apache.org/confluence/display/tika/PDFParser%20(Apache%20PDFBox) Then there's this on the horizon (??): https://issues.apache.org/jira/browse/TIKA-2749 On Wed, Feb 12, 2020 at 8:53 AM Eric Pugh <ep...@opensourceconnections.com> wrote: > Is there a way that a mere mortal could understand to make that change? > Tika at times can be rather opaque in how the parameters all interact iwth > each other. > > > > On Feb 12, 2020, at 7:38 AM, Tim Allison (Jira) <j...@apache.org> wrote: > > > > > > [ > https://issues.apache.org/jira/browse/TIKA-3040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17035359#comment-17035359 > ] > > > > Tim Allison commented on TIKA-3040: > > ----------------------------------- > > > > Great! Thank you [~Mandalka]! > > > >> PDF inline OCR: Exception while processing certain image (others in > same PDF work) > >> > ---------------------------------------------------------------------------------- > >> > >> Key: TIKA-3040 > >> URL: https://issues.apache.org/jira/browse/TIKA-3040 > >> Project: Tika > >> Issue Type: Bug > >> Components: ocr > >> Affects Versions: 1.23 > >> Environment: Debian 10 > >> Tesseract > >> Reporter: Markus Mandalka > >> Priority: Minor > >> > >> There is a PDF document (without plain text content) in which text > content are scans of multiple pages. > >> OCR for one of the images (text of a page) fails by tika-server with > activated inline OCR for PDF. > >> My fallback/alternate in Open Semantic ETL / Open Semantic Search using > pdfimages of Debian package poppler-utils to extract the images works for > all images in that PDF document). > >> I can not attach/upload this document here to the public because of > Copyright/Classified issues, but if interested, i could send it to certain > developer(s). > >> Following tika-server exception in result field > X-TIKA:EXCEPTION:embedded_stream_exception: > >> javax.imageio.IIOException: Bogus input colorspace at > java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeImage(Native > Method) at > java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageWriter.writeOnThread(JPEGImageWriter.java:1007) > at > java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageWriter.write(JPEGImageWriter.java:371) > at > org.apache.pdfbox.tools.imageio.ImageIOUtil.writeImage(ImageIOUtil.java:316) > at > org.apache.pdfbox.tools.imageio.ImageIOUtil.writeImage(ImageIOUtil.java:189) > at > org.apache.pdfbox.tools.imageio.ImageIOUtil.writeImage(ImageIOUtil.java:166) > at > org.apache.pdfbox.tools.imageio.ImageIOUtil.writeImage(ImageIOUtil.java:148) > at org.apache.tika.parser.pdf.PDF2XHTML.writeToBuffer(PDF2XHTML.java:304) > at > org.apache.tika.parser.pdf.PDF2XHTML.processImageObject(PDF2XHTML.java:268) > at org.apache.tika.parser.pdf.PDF2XHTML.extractImages(PDF2XHTML.java:194) > at org.apache.tika.parser.pdf.PDF2XHTML.endPage(PDF2XHTML.java:165) at > org.apache.pdfbox.text.PDFTextStripper.processPage(PDFTextStripper.java:393) > at org.apache.tika.parser.pdf.PDF2XHTML.processPage(PDF2XHTML.java:153) at > org.apache.tika.parser.pdf.AbstractPDF2XHTML.processPages(AbstractPDF2XHTML.java:867) > at > org.apache.pdfbox.text.PDFTextStripper.writeText(PDFTextStripper.java:266) > at org.apache.tika.parser.pdf.PDF2XHTML.process(PDF2XHTML.java:124) at > org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:162) at > org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at > org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) at > org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:143) at > org.apache.tika.parser.RecursiveParserWrapper.parse(RecursiveParserWrapper.java:233) > at > org.apache.tika.server.resource.TikaResource.parse(TikaResource.java:409) > at > org.apache.tika.server.resource.RecursiveMetadataResource.parseMetadata(RecursiveMetadataResource.java:147) > at > org.apache.tika.server.resource.RecursiveMetadataResource.getMetadata(RecursiveMetadataResource.java:123) > at jdk.internal.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) at > org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179) > at > org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96) > at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:201) at > org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:104) at > org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) > at > org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) > at > org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) > at > org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) > at > org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) > at > org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:247) > at > org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:79) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) > at > org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1296) > at > org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:190) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1211) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) > at > org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) > at org.eclipse.jetty.server.Server.handle(Server.java:500) at > org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:386) > at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:560) at > org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:378) at > org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:268) > at > org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) > at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at > org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117) at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:782) > at > org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:914) > at java.base/java.lang.Thread.run(Thread.java:834) > > > > > > > > -- > > This message was sent by Atlassian Jira > > (v8.3.4#803005) > > _______________________ > Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | > http://www.opensourceconnections.com < > http://www.opensourceconnections.com/> | My Free/Busy < > http://tinyurl.com/eric-cal> > Co-Author: Apache Solr Enterprise Search Server, 3rd Ed < > https://www.packtpub.com/big-data-and-business-intelligence/apache-solr-enterprise-search-server-third-edition-raw> > > This e-mail and all contents, including attachments, is considered to be > Company Confidential unless explicitly stated otherwise, regardless of > whether attachments are marked as such. > >
