Hello all,
Somewhat of a newbie in the PDF world so please explain in small words. :)

I am using Pdfium to convert pdf into images and it has been working great. I am using this bit of code:

page.Render(bmp, 0, 0, width, height, PageRotate.Normal, renderflags);

I have just discovered a pdf that has mostly text on it (an invoice) with the exception of one particular field. This field appears to be an embedded image. Long story short, when I convert the page to an image, the field is lost. If i were to compare it to something it is like the filed is in a different layer above the page. Like if you have layers in PhotoShop.

I have looked at the actual PDF object and do not see anything obvious on the page like "Layers". I tried a search on here but am afraid I do not have enough of the correct jargon to even ask properly.
Is there:
1) a way to "Flatten" a page?
2) a way to detect when this is the case to handle it in a different way?

Thanks in advance

Tal