Adobe Photoshop CS3 - Manual (Page 478)

PHOTOSHOP CS3
User Guide
471
Embed a watermark
To embed a digital watermark, you must first register with Digimarc Corporation—which maintains a database of
artists, designers, and photographers and their contact information—to get a unique Digimarc ID. You can then
embed the Digimarc ID in your images, along with information such as the copyright year or a restricted-use
identifier.
1 Open the image that you want to watermark. You can embed only one digital watermark per image. The Embed
Watermark filter won’t work on an image that has been previously watermarked.
If you’re working with a layered image, you should flatten the image before watermarking it; otherwise, the
watermark will affect the active layer only.
Note: You can add a digital watermark to an indexed-color image by first converting the image to RGB mode, embedding
the watermark, and then converting the image back to Indexed Color mode. However, the results may be inconsistent.
To make sure that the watermark was embedded, run the Read Watermark filter.
2 Choose Filter > Digimarc > Embed Watermark.
3 If you are using the filter for the first time, click the Personalize button. Get a Digimarc ID by clicking Info to
launch your web browser and visit the Digimarc website at www.digimarc.com, or by contacting Digimarc at the
telephone number listed in the dialog box. Enter your PIN and ID number in the Digimarc ID text box, and click OK.
After you enter a Digimarc ID, the Personalize button becomes a Change button, allowing you to enter a new
Digimarc ID.
4 Enter a copyright year, transaction ID, or image ID for the image.
5 Select any of the following image attributes:
Restricted Use Limits the use of the image.
Do Not Copy Specifies that the image should not be copied.
Adult Content Labels the image contents as suitable for adults only. (Within Photoshop, this option does not limit
access to adult-only images, but future versions of other applications may limit their display.)
6 For Target Output, specify whether the image is intended for monitor, web, or print display.
7 For Watermark Durability, drag the slider or enter a value, as described in the next section.
8 Select Verify to automatically assess the watermark’s durability after it is embedded.
9 Click OK.
Using the Watermark Durability setting
The default Watermark Durability setting is designed to strike a balance between watermark durability and visibility
in most images. However, you can adjust the Watermark Durability setting yourself to suit the needs of your images.
Low values are less visible in an image but less durable, and may be damaged by applying filters or by performing
some image editing, printing, and scanning operations. High values are more durable but may display some visible
noise in the image.
Your setting should depend on the intended use of the image and the goals you’ve set for your watermarks. For
example, it may be quite acceptable to use a higher Watermark Durability setting with JPEG images posted on a
website. The higher durability helps to ensure the persistence of the watermark, and the increased visibility often is
not noticeable with medium-resolution JPEG images. Digimarc recommends experimenting with various settings
as part of your testing process to determine which setting works best for the majority of your images.