The image data is picked out from the structures of the PDF document and converted directly into the Adobe Photoshop format. The advantage of this procedure is that the color space of most PDF images types is not affected. This makes it possible to convert the image data of nearly all images directly to the corresponding Photoshop color space.
Images with the "DeviceN" or "Separation" color space can be treated either as gray scale images or as color images in the alternate color space.
Additionally, it is possible to embed an ICC profile into the Photoshop file if valid profile data is present in the PDF image structure.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.