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| using PDFsharp to read images from a PDF https://forum.pdfsharp.net/viewtopic.php?f=2&t=1739 |
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| Author: | michael.hidalgo [ Fri Aug 12, 2011 6:08 pm ] |
| Post subject: | using PDFsharp to read images from a PDF |
Hi guys, I would like to know if is possible to use PDFsharp to read a pdf in silent mode and read the images within. I recieve a PDF that contains 4 images, so I need to find a way to extract those images and save it as individual resources. Thanks |
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| Author: | Thomas Hoevel [ Mon Aug 22, 2011 10:05 am ] |
| Post subject: | Re: using PDFsharp to read images from a PDF |
The Export Images sample doesn't support all possible filters yet, but may serve as a starter: http://www.pdfsharp.net/wiki/ExportImages-sample.ashx |
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| Author: | michael.hidalgo [ Mon Aug 29, 2011 4:15 pm ] |
| Post subject: | Re: using PDFsharp to read images from a PDF |
Hi Thomas, I saw the example at http://www.pdfsharp.net/wiki/ExportImages-sample.ashx. The problem I'm facing is that the images within the PDF were compressed using CCITTFaxDecode,I mean this is the filter. In the example you provided, I realized that you just support /DCTDecode and "/FlateDecode" what about "/CCITTFaxDecode"? |
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| Author: | Thomas Hoevel [ Tue Aug 30, 2011 8:25 am ] |
| Post subject: | Re: using PDFsharp to read images from a PDF |
michael.hidalgo wrote: what about "/CCITTFaxDecode"? Left as an exercise for the reader (as the sample source code says). You can use code (e.g. from TIFFlib) for that filter - PDFsharp only contains the encoder as the decoder is not (yet) needed. |
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