How do watermarks work, and what are they for?
In: Technology
Watermarks on an image are typically a semitransparent logo or signature layered over the original image, typically a stock photo or a drawing, in order to prevent other people from taking the image and claiming it as their own.
A watermark is a mark on a document that allows the document to be seen, but also permanently marks or with its source.
This means a document can be made public, but in the event someone tries to copy it, the watermark will show that they are not the original source.
A good example is the watermark used on a digital image – a lot of image libraries will show you all of the images they have available, but marked with the name of the library all over the picture. This means you can look through the library and cost an image your want to use (as they can still be easily seen through the watermark), but before you can use it you will need to pay they library to give you a copy of the image without the watermark. If you just copy the image they show them everyone else is able to see that it is an image from the library and you have not paid for it.
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