Rotating PDF less Quality

We are migrating to new forums engine, no new registration or posting currently available. TIA for your patience.

Rotating PDF less Quality

Post by GHWels » Mon Sep 09, 2024 03:40 PM

when i am rotating an Image (PDF) the image looses quality.
what can I do?

thank you GH

Re: Rotating PDF less Quality

Post by Alex » Mon Sep 09, 2024 04:40 PM

Hello,

I think you have quality loss because you are rendering PDF page and rotating rendered image, i.e. you do "raster rotation" of PDF page.

If you want to rotate content of PDF page without content rasterization, you can go by several ways:
1. PdfPage.RotateContentOrthogonaly method (https://www.vintasoft.com/docs/vsimagin ... onaly.html)
2. PdfPageRotateOrthogonallyCommand class (https://www.vintasoft.com/docs/vsimaging-dotnet/Vintasoft.Imaging.Pdf/Vintasoft.Imaging.Pdf.Processing.PdfPageRotateOrthogonallyCommand.html)
3. PdfRotateCommand class (https://www.vintasoft.com/docs/vsimaging-dotnet/Vintasoft.Imaging.Pdf/Vintasoft.Imaging.ImageProcessing.Transforms.PdfRotateCommand.html)

Best regards, Alexander

Re: Rotating PDF less Quality

Post by GHWels » Tue Sep 10, 2024 06:09 PM

Thank your for your fast answer

I loaded the image to your Vintasoft.Imaging.UI.AnnotionViewer
and want to rotate the image with annotations inside the viewer?

GH

Re: Rotating PDF less Quality

Post by Alex » Thu Sep 12, 2024 08:42 AM

Hello,
I loaded the image to your Vintasoft.Imaging.UI.AnnotionViewer and want to rotate the image with annotations inside the viewer? In this case you need to use PdfRotateCommand class.

Best regards, Alexander

Page 1 from 1: 1

VintaSoft PDF .NET Plug-in Discussions