Interface surface having coded data with predetermined pattern
First Claim
1. An interface surface for enabling interaction between a user and a computer system via a sensing device, the interface including visible graphical information and substantially invisible coded data readable by the sensing device, the coded data comprising a plurality of substantially undifferentiated marks positioned relative to a predetermined pattern, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark'"'"'s minimum radius is greater than 40% of the length of that mark'"'"'s maximum radius, the predetermined pattern includes a target structure extending radially outwardly from a centre of the pattern for allowing relative rotation of the predetermined pattern to be determined.
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Accused Products
Abstract
An interface surface for enabling interaction between a user and a computer system via a sensing device, the interface including visible graphical information and substantially invisible coded data readable by the sensing device, the coded data comprising a plurality of substantially undifferentiated marks positioned relative to a predetermined pattern, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark'"'"'s minimum radius is greater than 40% of the length of that mark'"'"'s maximum radius.
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Citations
24 Claims
- 1. An interface surface for enabling interaction between a user and a computer system via a sensing device, the interface including visible graphical information and substantially invisible coded data readable by the sensing device, the coded data comprising a plurality of substantially undifferentiated marks positioned relative to a predetermined pattern, wherein each mark has a minimum radius and a maximum radius and wherein the length of a mark'"'"'s minimum radius is greater than 40% of the length of that mark'"'"'s maximum radius, the predetermined pattern includes a target structure extending radially outwardly from a centre of the pattern for allowing relative rotation of the predetermined pattern to be determined.
Specification