Reply to post: Re: Copyright and Mathematical Tables

Forget trigonometry, 'cos Babylonians did it better 3,700 years ago – by counting in base 60!


Re: Copyright and Mathematical Tables

A simple way to identify tables that are printed as graphics is to sprinkle single yellow pixel codes over the image area. This was invented by Xerox for the early colour printers. The government insisted that the serial number of each machine be printed on the copies to make it possible to track money counterfeiters.

Single yellow pixels are almost impossible to see visually. Privacy violation started a long time ago.

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