[PDFBOX-1266] When I try to convert certain pages of certain PDF to images I am getting error java.lang.ClassCastException: org.apache.pdfbox.cos.COSNull cannot be cast to org.apache.pdfbox.cos.COSDictionary

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.0
• Fix Version/s: 1.7.0
• Component/s: PDModel
• Environment: java version "1.6.0_30"; Java(TM) SE Runtime Environment (build 1.6.0_30-b12); Java HotSpot(TM) 64-Bit Server VM (build 20.5-b03, mixed mode); ; Fedora 16 (and also Debian Squeeze) not tested on other systems
• Assignee: Andreas Lehmkühler
• Reporter: Radim Hatlapatka
• Created: 21/Mar/12 20:21
• Updated: 29/May/12 16:21
• Resolved: 15/May/12 08:58

Description

Unable to convert certain pages to images for certain PDF documents. Getting error: java.lang.ClassCastException: org.apache.pdfbox.cos.COSNull cannot be cast to org.apache.pdfbox.cos.COSDictionary

method for converting page is called this way: BufferedImage image = page.convertToImage(BufferedImage.TYPE_3BYTE_BGR, 300); // where page is of type org.​apache.​pdfbox.​pdmodel.​PDPage

Full stacktrace (of relevant part):
java.lang.ClassCastException: org.apache.pdfbox.cos.COSNull cannot be cast to org.apache.pdfbox.cos.COSDictionary
at org.apache.pdfbox.pdmodel.graphics.xobject.PDCcitt.getRGBImage(PDCcitt.java:119)
at org.apache.pdfbox.util.operator.pagedrawer.Invoke.process(Invoke.java:78)
at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:551)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:274)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:251)
at org.apache.pdfbox.util.operator.pagedrawer.Invoke.process(Invoke.java:130)
at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:551)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:274)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:251)
at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:225)
at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:107)
at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:722)
at eu.eudml.enhancement.pdf2textviaocr.PdfImageExtractor.extractImagesUsingPdfParser(PdfImageExtractor.java:236)