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Tilman Hausherr commented on PDFBOX-2158: ----------------------------------------- It isn't the only problem in that PDF. I get an NPE when trying to render it, which is due to this decode array: {code} <</BitsPerComponent 1/Decode[1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 null null null null null null null null]/Filter/FlateDecode/Height 140/ImageMask true {code} That decode array should have only 2 elements (because of BitsPerComponent 1) or because it is a mask. > ExtractText missing most of text in this PDF file, due to font bounding box > with minus infinity > ----------------------------------------------------------------------------------------------- > > Key: PDFBOX-2158 > URL: https://issues.apache.org/jira/browse/PDFBOX-2158 > Project: PDFBox > Issue Type: Bug > Components: Text extraction > Affects Versions: 1.8.5 > Environment: Windows x64 > Reporter: Joel Hirsh > Attachments: negative.text.box.pdf > > > Attached PDF file is missing most of the text when processed by the > ExtractText example program > I traced it down to PDFontDescriptorDictionary.getFontBoundingBox() getting a > rectange for COSName.FONT_BBOX that contained a ymin value of minus > infinity. That method then creates a PDRectangle which calculates a bounding > box with a ymin value of -65,329, and results in an enormous text size, and > things go downhill from there. The text cannot be matched up, and most of it > ends up being discarded. > I was able to hack a fix by doing a check in the constructor > PDRectangle.PDRectangle( COSArray array ) for big negative numbers and > setting them to 0. With that change, all the text came through as expected. > However, I don't have enough familiarity with the code to understand what a > real fix ought to look like. > The PDF file looks to be fine by other programs such as Acrobat and NitroPDF -- This message was sent by Atlassian JIRA (v6.2#6252)