watermarks to identify bitmaps
A Digimarc watermark
embeds copyright details, contact information, and image attributes in an image.
A watermark makes subtle changes to the brightness of pixels in an image. These
changes cannot be readily seen; however at high magnification, you might notice
changes in the brightness of some pixels. Digimarc watermarks aren't affected by
normal editing, printing, and scanning.
When you open an
image in CorelDRAW, you can check for a watermark. If a watermark is present, a
copyright symbol appears on the title bar. You can find information about the
watermarked image by reading the embedded message and by linking to the contact
profile in the Digimarc database.
In CorelDRAW, you can
also embed Digimarc watermarks in images. First, you must obtain a unique
Creator ID by subscribing to Digimarc's online service. The Creator ID includes
contact details, such as name, phone number, address, e-mail and Web addresses.
Once you have a
Creator ID, you can embed a watermark in an image. You can specify the copyright
year, image attributes, and the durability of a watermark. You can also specify
the target output method for an image, such as print or Web.
do not prevent unauthorized image use or copyright infringement. But the
watermarks do communicate copyright claims. They also provide contact
information for those who want to use or license an image.