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Blck and white colors are swaped in PDF

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Alexander
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Alexander asked on 25 Jan 2019, 01:25 PM

One of  my customers becomes some  times scanned documents, where black and white are exchanged(whinte fonts on black background). Other software displays documents  correct (for example Edge or PDFXchange Viewer). I have figured out that those documents are created with PDF24 programm. Unfortunatly i can not  give you an example because they contains businis secrets and personal information of other peaple.  Could you perhaps help me to fix this behaviour.

 

I examen one Document structure with itext rups. It seems that embeded Pictures are realy with swaped colors. Perhaps I have to Config Control right way to display Document correctly. I use default PdfViewer  settings.

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Tanya
Telerik team
answered on 30 Jan 2019, 08:26 AM
Hi Alexander,

There is a known issue in RadPdfViewer related to images which are compressed with CCITTFaxDecode. You can find more information about this case in the related public item: PdfViewer: Images compressed with CCITTFaxDecode with BlackIs1 parameter are rendered with inverted black and white colors.

It seems like you are hitting the same case but I cannot confirm that without testing a document. Is it possible to create an example document without the sensitive data and share it? Additionally, you can submit a support ticket through our system where the threads are private. I can assure you that we treat all the customer documents in a strictly confidential manner and use them only for testing purposes.

Regards,
Tanya
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Tanya
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