PDFsharp & MigraDoc Foundation

I'm working with a PDF scanned image. The image is stored as CCITTFaxDecode. I'm trying to extract the /DecodeParms for the image using GetValue("/DecodeParms"), and get this message:

"Debug.Assert(type != null, "No value type specified in meta information. Please send this file to PDFsharp support.");"

Also the object's Meta parameter is Null

Anyone have a hint????

[Here is the PDF Header]
%PDF-1.4 Sharp Scanned ImagePDF
%Sharp Non-Encryption
3 0 obj
<<
/Type /Page
/Parent 1 0 R
/Resources 4 0 R
/Contents 5 0 R
/MediaBox [0 0 613 790]
>>
endobj
4 0 obj
<<
/ProcSet [/PDF /ImageB]
/XObject << /Img1 6 0 R >>
>>
endobj
5 0 obj
<<
/Length 27
>>
stream
613 0 0 790 0 0 cm
/Img1 Do
endstream
endobj
6 0 obj
<<
/Type /XObject
/Subtype /Image
/Name /Img1
/Filter /CCITTFaxDecode
/DecodeParms << /K -1 /Columns 1704 /Rows 2196 >>
/Width 1704
/Height 2196
/BitsPerComponent 1
/ColorSpace /DeviceGray
/Length 7 0 R
>>
stream

How about trying GetArray("/DecodeParms") or GetDictionary("/DecodeParms")?
There is a list of values, not just a single value so GetValue can't help (but I don't know which function has to be used in this case).

_________________
Regards
Thomas Hoevel
PDFsharp Team

Yes, GetDictionary("/DecodeParms") returns a PdfDictionary with the elements. Then I had to call GetInteger("/K") ..("/Columns") and ..("/Rows") to get the values.

Thanks for the clarification..... I'm still learning how to use PDFSharp~!