Q:
I would like to embed images to my PDFs without loosing any quality (i.e. using PNG instead of JPEG compression).
I was able to achieve lossless embedding with RAW/uncompressed format but the file size is huge.
I am trying to understand what is being done “under the hood” by PDFTron when adding images to the PDF that result in the pixilation effect.
How do I embed image in PDF using lossless PNG (Flate) compression?
A:
To embed image in PDF with Flate you need to specify the compression hint as follows:
Obj flate_hint = objset.CreateArray();
flate_hint.PushBackName(“Flate”);
flate_hint.PushBackName(“Level”);
flate_hint.PushBackNumber(9); // Set max compression vs speed.
For more info, please see:
https://groups.google.com/d/topic/pdfnet-sdk/wCK-rAmEPr0/discussion