Dear B-A,
I have been following the “what value a photo” with interest. One thing that has not been mentioned, is that if your name is not on or in an image, it is difficult to identify the work as being yours.
It is important that you identify your digital images by naming yourself as photographer and copyright holder in the EXIF data of your images. Sure EXIF data can be stripped, but most people who “borrow” images usually overlook it and it remains as a nice digital thumb-print on your images.
For those who have not set up their EXIF, and would like to know how, it is in the manual.
Cheers,
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There are other ways to add “invisible” watermarks – such techniques can also be used for steganography – a technique for hiding messages (or other images) in a picture – very useful for spies and others! However – some of the techniques rely on you having access to the image file that was used in the publication, which is unlikely without a court order I guess!
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Another trick is adding very subtle tags. Have a look at the first image (ignoring the obvious tag at the bottom): http://www.tonykeenebirds.co.uk/abirds/mangroverobin.html You can see it if you up the contrast and drop the brightness… Cheers,
Tony
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