There is sample code on the Aspose.PDF for .NET documentation: https://docs.aspose.com/pdf/net/get-resolution-and-dimensions-of-embedded-images/
The code example is to get resolution and dimensions of embedded images in the PDF. In case you want to determine the DPI of PDF Page (containing text or other elements), please consider our previous response in this discussion.
Yes you’re right, I didn’t read properly. However I came here from a google search where I hoped to find the documentation I posted in the link, so maybe someone else happens to come here looking for the same thing I was and will see my post… who knows!
Sure. Your post would definitely help others looking for the similar functionality. Thanks for sharing your findings.