Image stamp maker software set the logo or the text to be more or less transparent, and place it wherever you want the watermarking to be on the image. Watermark Software also support batch mode, the process of adding watermark to many pictures will less than 1 minute. If you add this software or create more knowledge so, go this link www.pdfwatermarksoftware.com. It is support to add prefix and suffix with resultant file name for better naming.