SIZE/SCALE AND ORIENTATION DETERMINATION OF A POINTER IN A CAMERA-BASED TOUCH SYSTEM
First Claim
1. A method comprising:
- acquiring images of a pointer proximate an input surface from different vantages;
processing pixel data of each image to determine edges of said pointer; and
triangulating an input area of said pointer based on said determined edges.
6 Assignments
0 Petitions
Accused Products
Abstract
A touch system includes a touch surface and at least two cameras associated with the touch surface. The at least two cameras acquire images of the touch surface from different locations and having overlapping fields of view. A digital signal processor is associated with each camera. The digital signal processors process pixel data acquired by selected pixel subsets of the at least two digital cameras to generate pointer characteristic data when a pointer exists in the acquired images. The pointer characteristic data identifies edges of the pointer. A master digital signal processor triangulates the edge information in the pointer characteristic data to determine a bounding area that represents a pointer perimeter.
17 Citations
12 Claims
-
1. A method comprising:
-
acquiring images of a pointer proximate an input surface from different vantages; processing pixel data of each image to determine edges of said pointer; and triangulating an input area of said pointer based on said determined edges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification