Digimarc Copyright Protection; Read A Digimarc Watermark; Adding Digital Copyright Information; Before Adding A Digital Watermark - Adobe Photoshop CS6 User Manual

Digimarc copyright protection

Read a Digimarc watermark

Adding digital copyright information

Before adding a digital watermark

Embed a watermark
Using the Watermark Durability setting
Check the signal strength meter
Note: Digimarc plug-ins require a 32-bit operating system. They are unsupported in 64-bit versions of Windows and Mac OS.
Read a Digimarc watermark
1. Choose Filter > Digimarc > Read Watermark. If the filter finds a watermark, a dialog box displays the Digimarc ID, creator information, and
image attributes.
2. Click OK, or for more information, click Web Lookup. The Digimarc website is displayed in your web browser, where contact details appear
for the given creator ID.
Adding digital copyright information
You can add copyright information to Photoshop images and notify users that an image is copyright protected via a digital watermark that uses
Digimarc ImageBridge technology. The watermark—a digital code added as noise to the image—is virtually imperceptible to the human eye. The
Digimarc watermark is durable in both digital and printed forms, surviving typical image edits and file format conversions.
Embedding a digital watermark in an image lets viewers obtain information about the creator of the image. This feature is particularly valuable to
image creators who license their work to others. Copying an image with an embedded watermark also copies the watermark and any information
associated with it.
For more detailed information on embedding Digimarc digital watermarks, refer to the Digimarc website at www.digimarc.com.
Before adding a digital watermark
Keep in mind the following considerations before embedding a digital watermark in your image.
Color variation The image must contain some degree of variation or randomness in color to embed the digital watermark effectively and
imperceptibly. The image cannot consist mostly or entirely of a single flat color.
Pixel dimensions The Digimarc technology requires a minimum number of pixels to work. Digimarc recommends the following minimum pixel
dimensions for the image to be watermarked:
100 pixels by 100 pixels if you don't expect the image to be modified or compressed prior to its actual use.
256 pixels by 256 pixels if you expect the image to be cropped, rotated, compressed, or otherwise modified after watermarking.
750 pixels by 750 pixels if you expect the image to appear ultimately in printed form at 300 dpi or greater.
There is no upper limit on pixel dimensions for watermarking.
File compression In general, a Digimarc watermark will survive lossy compression methods, such as JPEG, though it is advisable to favor image
quality over file size (a JPEG compression setting of 4 or higher works best). In addition, the higher the Watermark Durability setting you choose
when embedding the watermark, the better the chances that the digital watermark will survive compression.
Workflow Digital watermarking should be one of the very last tasks you perform on an image, except for file compression.
Use the following recommended workflow:
Make all necessary modifications to your image until you are satisfied with its final appearance (this includes resizing and color correction).
Embed the Digimarc watermark.
If needed, compress the image by saving it in JPEG or GIF format.
If the image is intended for printed output, perform the color separation.
Read the watermark and use the signal strength meter to verify that the image contains a watermark of sufficient strength for your purposes.
Publish the digital watermarked image.
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