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CCITTFaxDecode filter for Acrobat
I writing a app to extract text from a PDF file - I'm able to extract the text if the PDF file is compressed with Flatedecode - But it fails if the compression is CCITTFaxDecode. Can anyone help me to get the filter for CCITTFaxDecode compression. Thanks in advance
Adobe Acrobat
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Karl Heinz Kremer
ASKER
I'm using the code found at http://www.codeproject.com/KB/cpp/ExtractPDFText.aspx
This code assumes that the PDF file has text objects compressed using FlateDecode filter and it uses zlib for uncompressing the streams.
But my PDF files have text behind image and the filter used is CCITTFaxDecode - Now I want to know how do I uncompress this filter. Thanks in advance
This code assumes that the PDF file has text objects compressed using FlateDecode filter and it uses zlib for uncompressing the streams.
But my PDF files have text behind image and the filter used is CCITTFaxDecode - Now I want to know how do I uncompress this filter. Thanks in advance
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ASKER
yes your clue to ignore the image helped as the pdf we were working stored text data a little differently and at the end of the file.
The order of information in a PDF file has no meaning. You need to read up on how the XRef table is used in PDF.
What environment are you using? Are you using any PDF library (that would be the ideal situation, because you really do not want to write the complete PDF handling from scratch)?