Re: [Podofo-users] extract tiff from scanned pdf

2018-06-01 Thread Martin Froese

thank you dimitry!
i think it would be a valuable contribution since afaik scanners use 
tiff to save pictures to pdfs. I would be happy to return to podofo as 
soon as this is implemented, until then i am looking into 
https://mupdf.com, their image extract tool can handle tiffs and save 
them as pngs.

martin


Am 31.05.2018 um 18:58 schrieb Dmitry Salychev:

Hi Martin,

podofo mailing list doesn't look like an active place from my pov.

If you're going to decode buffer using CCITT decoder, I've bad news 
for you.

There is only a draft implementation of PdfCCITTFilter in
PdfFiltersPrivate.cpp. You may notice that method to decode block isn't
implemented at all:

void PdfCCITTFilter::DecodeBlockImpl( const char*, pdf_long )
{

}

I've a decoder implemented (using libtiff), but it's a part of proprietary
product and I'm just trying to persuade my team to prepare a patch and 
donate
code to the library. Everyone would benefit in this case. I think I'll 
be able

to share it in several weeks only.

P.S. I've podofo 0.9.5 sources, so my information can be outdated.

Regards,

- Dmitry



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Re: [Podofo-users] extract tiff from scanned pdf

2018-05-31 Thread Dmitry Salychev
Hi Martin,

podofo mailing list doesn't look like an active place from my pov.

If you're going to decode buffer using CCITT decoder, I've bad news for you.
There is only a draft implementation of PdfCCITTFilter in
PdfFiltersPrivate.cpp. You may notice that method to decode block isn't
implemented at all:

void PdfCCITTFilter::DecodeBlockImpl( const char*, pdf_long )
{

}

I've a decoder implemented (using libtiff), but it's a part of proprietary
product and I'm just trying to persuade my team to prepare a patch and
donate
code to the library. Everyone would benefit in this case. I think I'll be
able
to share it in several weeks only.

P.S. I've podofo 0.9.5 sources, so my information can be outdated.

Regards,

- Dmitry
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Re: [Podofo-users] extract tiff from scanned pdf

2018-05-31 Thread Martin Froese
hmmm, seems to be difficult? or maybe i could somehow make screenshots 
of entire pages?



Am 25.05.2018 um 16:31 schrieb Martin Froese:

hi everyone,

is extracting tiffs supported? i build podofo with the latest tiff 
libs but get this error from the podofoimgextract.exe


PoDoFo encountered an error. Error: 35 ePdfError_UnsupportedFilter
    Callstack:
    #0 Error Source: 
c:\ecworks_mep\podofo-0.9.6-rc1\src\base\pdffiltersprivate.cpp:1280


this section seems to be excluded using DS_CCITT_DEVELOPMENT_CODE?
sample pdf is attached.

thank you!


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[Podofo-users] extract tiff from scanned pdf

2018-05-25 Thread Martin Froese

hi everyone,

is extracting tiffs supported? i build podofo with the latest tiff libs 
but get this error from the podofoimgextract.exe


PoDoFo encountered an error. Error: 35 ePdfError_UnsupportedFilter
    Callstack:
    #0 Error Source: 
c:\ecworks_mep\podofo-0.9.6-rc1\src\base\pdffiltersprivate.cpp:1280


this section seems to be excluded using DS_CCITT_DEVELOPMENT_CODE?
sample pdf is attached.

thank you!



emptyTiffScanner.pdf
Description: Adobe PDF document
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