Problem with Stamping

Aspose.PDF Product Family
1

Hello,
I am using the Stamp class in order to stamp PDF's. Here are the property values I'm using:

IsBackground = false;
Rotation = 0;
SetOrigin(50, 7);
Opacity = 0.5f;

I also call BindImage()/BindLogo() depending on what I'm trying to stamp.

The problem is that some of the pages of the PDF are stamped while others are not. The PDF I am stamping is a mixture of pages that were scanned and pages that were converted from MS Word. What is the problem? Please help.

Thanks,
Philip

2

Hi Philip,

Firstly please be sure that you are using the latest version of Aspose.Pdf.Kit which produced this error.

Secondly please refer to the post below which could provide help info.

<A href="</A>.</P> <P>If you are still chocked by this isse, please provide all resources that can reproduce the same error. We will investigate it and reply to you soon.</P> <P> </P>

3

Hello,

I am using the latest version(2.1.3.0). After looking further into the problem I have determined that the stamper is not stamping scanned documents. I have attached a file I have been using to test the problem.

Here is the code I'm using:

Stamp imageStamp = new Stamp();

imageStamp.BindImage(Filename);

imageStamp.Rotation = 0;

imageStamp.Opacity = 0.5f;

imageStamp.SetOrigin(1, 1);

imageStamp.IsBackground = false;

InStream.Seek(0, SeekOrigin.Begin);

Stream outStream = new MemoryStream();

PdfFileStamp stamper2 = new PdfFileStamp(InStream, outStream);

stamper2.AddStamp(imageStamp);

stamper2.Close();

outStream.Seek(0, SeekOrigin.Begin);

return outStream;

Thanks,
Philip

4

Hi Philip,

After I reproduced the same error and a disscussion with our developers, I confirmed that you can not stamp an image on a scanned pdf document with the latest version of Aspose.Pdf.Kit.

Sorry for your inconvenience.

5

Hello,

Is the problem going to be fixed? If so, any idea when it will be fixed?

-Philip

6

Hi ,

This issue can not be fixed in three monthes because of some tough technical problems.

7

I have tested this issue using the “Add Watermark & Backgroud” in Adobe Acrobat6.0 Professional and found that the stamp also was not shown.
This is a problem about PDF specification and we could not solve it now.

8

Okay. Thanks for the information. I tested Adobe tool you mentioned in Adobe Acrobat 7.0 Professional and although the adding a background did not, for obvious reasons, I was able to add text to the top of the document using it.

While trying to come up with a workaround using Pdf.Kit, I ran into an issue of the coordinate system being "shifted" when I tried to add anything to the page. What I mean is that (0,0) was no longer the lower-left hand corner of the page but was apparently well below the bottom of the page. Also the coordinate (0, PageHeight) was right below the scanned image.

9

I will check the issue you mentioned and reply you in serveral days.