Adobe photoshop cs2 사용자 설명서

ADOBE PHOTOSHOP CS2 

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. 

Keep in mind the following considerations before embedding a digital watermark in your image. 

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. 

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. 

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. 

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.