Regarding WORDSNET-19770, we have completed the work on your issue and most likely will close this issue with “Not a Bug” status. Please check below the analysis details:
A decline in quality occurs at the stage of conversion of EMF to PNG:
using (var vectorImageStream = new MemoryStream(shape.ImageData.ImageBytes))
using (var image = Image.FromStream(vectorImageStream))
using (var resterImageStream = new MemoryStream())
You can verify this by adding a line:
Aspose.Words cannot affect this; it just takes the current PNG and inserts it into the PDF. If we can help you with anything else, please feel free to ask.