发明名称 |
SIZE/SCALE AND ORIENTATION DETERMINATION OF A POINTER IN A CAMERA-BASED TOUCH SYSTEM |
摘要 |
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. |
申请公布号 |
US2012280943(A1) |
申请公布日期 |
2012.11.08 |
申请号 |
US201213554044 |
申请日期 |
2012.07.20 |
申请人 |
MORRISON GERALD;AKITT TREVOR;SU SCOTT;SMART TECHNOLOGIES ULC |
发明人 |
MORRISON GERALD;AKITT TREVOR;SU SCOTT |
分类号 |
G06F3/042;G06F3/033 |
主分类号 |
G06F3/042 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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