You can use Boxoft Batch Photo Processor to add image watermark to photos. it provides other two watermark:date, text. if you want to tounch photo up, you can also use this program. select a date format from a dozen of formats build-in at will. it allows you to adjust photo contrast, brightness, color Balance, sharpen, even make a nostalgic photo, resize, crop, rotate it. in one words, it is powerful can not be described in several sentence.
More detals follow below easy steps:
Launch it by double clicking its desktop icon, add some aim pictures;
On the left-right box, click "Annotate", choose image watermark;
Click green arrows towards the right to start editing picture;
On pop-up box, select a pre-defined image to be printed on photo;