Using Digimarc 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.
Detecting watermarks
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.
Embedding watermarks
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 the Web.
Digimarc watermarks 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.
For more information about Digimarc, see www.digimarc.com.
To detect a watermark |  |
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Click Web lookup to view the Web page with contact details, or call the Digimarc fax-back service at the listed fax number.
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To get a Creator ID | |
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In the Personalize Creator ID dialog box, click Register, and follow the instructions on the Digimarc Web site.
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To embed a watermark | |
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If you want to confirm the information available to viewers when they detect the watermark, enable the Verify check box.
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In the Copyright year(s) box, you cannot type a year before 1922 or after the current year. Separate the years with commas.
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In the Target output box, the Monitor and Web controls require a setting of less than 200 per inch (dpi), and the Printer control requires a setting of 300 dpi or higher.
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Combine all objects with the background before adding a watermark. For more information about combining objects with the background, see “Combining objects.”
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