Q:
We are looking to remove transparencies on images within a pdf document, would we be able to do this using PDFNet SDK? The pdf needs to be processed via document composition tool which does not support transparencies on images.
A:
PDFNet does not offer built-in vector transparency flattening. However, you could use PDFDraw (see http://www.pdftron.com/pdfnet/samplecode.html#PDFDraw) to rasterize PDF pages with transparency and replace the existing pages with rasterized version (e.g. see AddImage sample for how to create a PDF page from a Bitmap).
For discussion on how to determine if a PDF has transparency please see:
https://groups.google.com/d/topic/pdfnet-sdk/Ke75f9qBGYc/discussion