Image stamper software option to resize or set image size with the two option relative size and fixed size. In relative size you can resize image by enlarge or reduce and also set height and width. You give positioning of stamp on page like top, bottom, left, right, etc. You can set both text and image to watermark in batch mode. If you add this software or create more knowledge so, go this link www.pdfwatermarksoftware.com to add stamp on page.