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A Getty crawler would have access to all the images that really are Getty images, making it fairly easy to identify a non-Getty images with fake Getty watermark
by jonhendry 14y ago
A Getty crawler would have access to all the images that really are Getty images, making it fairly easy to identify a non-Getty images with fake Getty watermarks. Some sort of hashing function, perhaps, or something like tineye uses.
Since these new watermarks include a URL that identifies the Getty stock number of the photo, someone trying to fake that would end up putting a bogus stock number on the watermark, which makes it even easier to ignore fakes. The fake watermark would either use a number that doesn't correspond to a Getty picture at all, or a number that points at a different image.
- weinzierl 14y agoI agree with you that the Getty crawler has access to all the Getty images and can identify non-Getty images. My point is that the watermark is not of much help for this task. On the one hand it is easily misled to find false positives on the other hand it will miss many images which have been altered strongly enough to destroy the watermark. You are right with your objection that watermark contains the stock number. I don't see however how this can help a crawler to identify a fake stock number. To compare the (possible altered) image with the original we have to use an image hash and then we could have used the image hash in the first place.