c++ decode CCITT encoded images in pdfs

Question

I'm trying to extract all images out of PDF files in C++. I'm stuck in decoding CCITT encoded images.

Does anyone know an opensourced code for this?

I use the ImageMagick Magick++ Library, is it possible to do the decoding with this library, too?

Thanks for your help!

score 5 · Accepted Answer · answered Jan 04 '11 at 18:52

5

CCITT is one of the encodings TIFF supports, though in a PDF file the CCITT images are probably raw data.

You can convert a raw CCITT image into a Tiff image using Fax2Tiff. It should be easy enough to work with the image once it is encoded as a Tiff.

Fax2Tiff is part of LibTiff. See LibTiff Source

answered Jan 04 '11 at 18:52

Brian

Thanks for your answer! Fax2Tiff seems not to be a library, it is a tool. I need to do the conversion in the program. – Van Coding Jan 05 '11 at 12:24
@FlashFan: While Fax2Tiff *is* a tool, it's also open source. Find the source code for it within LibTiff and adjust it as needed for your purposes. – Brian Jan 05 '11 at 15:08

score 3 · Answer 2 · answered Jan 04 '11 at 19:26

3

Or you can append a header on it and treat it as a tiff file.

answered Jan 04 '11 at 19:26

mark stephens

Basically, that is what my answer is suggesting. – Brian Jan 04 '11 at 19:28
How would "adding a header" work with libtiff. Have you some sample c++ code? – Van Coding Jan 05 '11 at 12:26

2 Answers2