2013.09.22 13:53 "[Tiff] Use libtiff to decode CCITT from pdf...", by Wizard Coder
Hi,
I see that libtiff can be use to transcode CCITT data from pdf to a tiff file (* see at the end)
I take the sample apply compression modification remove TIFFTAG_T4OPTIONS, it create an error message...
My problem is to map decode parameter from pdf to tiff field
My suppositions are:
/Width - From pdf base header.
Base10 value TIFFTAG_IMAGEWIDTH = value
/Height - From pdf base header.
Base 10 value TIFFTAG_IMAGELENGTH = value
/Rows - From DecodeParms.
Vase 10 value TIFFTAG_ROWSPERSTRIP = value
/BlackIs1 - From DecodeParms.
true TIFFTAG_PHOTOMETRIC = PHOTOMETRIC_MINISWHITE
false TIFFTAG_PHOTOMETRIC = PHOTOMETRIC_MINISBLACK
/EndOfBlock- From DecodeParms.
true TIFFTAG_FAXMODE |= FAXMODE_CLASSIC
false TIFFTAG_FAXMODE |= AXMODE_NORTC
/EncodedByteAlign- From DecodeParms.
true TIFFTAG_FAXMODE |= FAXMODE_BYTEALIGN
false TIFFTAG_FAXMODE |= 0
/EndOfLine - From DecodeParms.
true ?
false ?
/K - From DecodeParms.
0 TIFFTAG_COMPRESSION = COMPRESSION_CCITTRLE
<1 ?
>1 ?
// Always set.
TIFFTAG_BITSPERSAMPLE =1
TIFFTAG_SAMPLESPERPIXEL = 1
TIFFTAG_PLANARCONFIG =PLANARCONFIG_CONTIG
TIFFWriteRawStrip ( image, 0, "MyBuffer", "MyBuffer size - /Length from base header" );
Where can i found full information to use libtiff to decode CCITT from PDF?
Can you help me?
Thanks for your help,
WCoder
* On a previous thread: http://maptools-org.996276.n3.nabble.com/CCITTFaxDecode-with-EncodedByteAlign-How-to-create-a-TIFF-from-that-td3755.html
// /Width 3504
// /Height 2480
// /BitsPerComponent 1
// /ColorSpace /DeviceGray
// /Length 2 0 R
// /DecodeParms
// /K 0
// /Columns 3504
// /Rows 2480
// /EncodedByteAlign true
// /EndOfBlock false
////////////////////////////////////////////////////////////////////////////////////////////////////// TIFF* image = TIFFOpen ( "c:\\CCITT - K = 0 - Ext.tiff", "w" );
TIFFSetField(image, TIFFTAG_IMAGEWIDTH, 3504);
TIFFSetField(image, TIFFTAG_IMAGELENGTH, 2480);
TIFFSetField(image, TIFFTAG_BITSPERSAMPLE, 1);
TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(image, TIFFTAG_ROWSPERSTRIP, 2480);
TIFFSetField(image, TIFFTAG_COMPRESSION, COMPRESSION_CCITTRLE);
TIFFSetField(image, TIFFTAG_FAXMODE, FAXMODE_BYTEALIGN | FAXMODE_CLASSF);
TIFFSetField(image, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MI