Detect watermark?

Got an idea for enhancing PureBasic? New command(s) you'd like to see?
collectordave
Addict
Addict
Posts: 1309
Joined: Fri Aug 28, 2015 6:10 pm
Location: Portugal

Detect watermark?

Post by collectordave »

It is only a hopefull this.

Some papers are watermarked when purchased. these are used to print images etc. An example of this is postage stamps.

Is it at all possible to detect this watermark from a scan of the printed image. Remember it is the paper that is watermarked not the image.

Baffled

CD
Any intelligent fool can make things bigger and more complex. It takes a touch of genius — and a lot of courage to move in the opposite direction.
Mistrel
Addict
Addict
Posts: 3415
Joined: Sat Jun 30, 2007 8:04 pm

Re: Detect watermark?

Post by Mistrel »

This depends highly on the reproduction quality of the scanner and not just what is present in the paper. For example, a watermark may be only visible in ultraviolet light but this won't be visible to a normal scanner.
Post Reply