Range Based Sensing
AssigneeQinetiq Limited
InventorMaurice Stanley
Life of this patent
Estimating the term…
Abstract
Ranging apparatus capable of projecting patterns of structured light tailored for use at particular ranges or depth regimes. Detected light points in a scene can be compared to pre-determined pattern templates to provide a simple and low cost gesture recognition system, for example as an interface to a smartphone or PDA. A structured light generator can be adapted to switch back and forth between said first and second structured patterns, either automatically according to a timing control, or adaptively in response to sensed information from the illuminated scene. Alternatively the structured light generator can be adapted to project the first and second patterns simultaneously. Separate light generators may be employed for the different patterns, or alternatively components can be shared.
Claims24
A method of gesture detection comprising:
- illuminating a detection area with at least one structured pattern of light points;
- detecting a plurality of light points incident on an object in said detection area;
- comparing the pattern of detected light points with a pre-determined plurality of pattern templates to determine a gesture match condition;
- and
- outputting a gesture match signal indicative of said matched template.
Ranging apparatus comprising:
- a structured light generator adapted to illuminate a scene with a first structured pattern of light points and a second structured pattern of light points, said first and second patterns being configured for operation at different ranges;
- a detector for detecting the location of light points projected in the scene;
- and
- a processor for determining, from the detected location of a projected point in said scene, the range to said point.
A method of range detection comprising:
- illuminating a scene with at least one structured pattern of light points detecting light points in the illuminated scene;
- selecting one set from a plurality of pre-defined sets of calibration data, each said data set corresponding to different depth ranges;
- and
- determining from the detected location of a projected point, the range to said point according to the selected calibration data set.
(canceled)
Dependencies are inferred from the claim text.