Other & Digimarc Filters

Other Filters

Custom -- can create your own filters
High Pass - Retains edge details in the specified radius where sharp color transitions occur and suppresses the rest of the image
Minimum and Maximum - useful for modifying masks
Offset - Moves a selection a specified horizontal or vertical amount, leaving an empty space at the selection's original location

Digimarc filters embed a digital watermark into an image to store copyright information
The watermark is a digital code added as noise to the image
Generally imperceptible to the human eye.
durable in both digital and printed forms & survives scanning
Doesn't work in flat images -- image must contain some degree of variation or randomness in color to embed the watermark effectively and imperceptibly
following minimum pixel dimensions for the image to be watermarked --
100 x 100 pixels if not compressing;
256 x 256 pixels if you expect the image to be cropped, rotated, compressed, or otherwise modified after watermarking;
750 x 750 pixels if image is to be printed at 300 dpi or greater
Should use JPEG compression of 4 or higher
Should be one of last tasks you do
Need to register with Digimarc Web site in order to embed Digimarc watermarks
Costs $49 for an image ID for up to 100 images
Communicates your image copyright
Provides potential buyers with your name, address, phone number, e-mail or URL address to make a purchase