The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2018
Filed:
Jul. 12, 2016
Hong Kong Applied Science and Technology Research Institute Company Limited, Hong Kong, HK;
Wei Zhang, Hong Kong, HK;
Hong Kong Applied Science and Technology Research, Hong Kong, HK;
Abstract
A wearable device, having a camera and a light source, receives user inputs by a first method of measuring a height of a finger-like object's tip above a reference surface if this surface is present, or a second method of estimating a 3D location of the tip. In the first method, a plain sheet of light is projected to the object, casting a shadow on the surface. A camera-observed shadow length is used to compute the tip's height above the surface. In the second method, the nearest and farthest locations of the tip are estimated according to pre-determined lower and upper bounds of the object's physical width. The object is then illuminated with a structured-light pattern configured such that an area between the nearest and farthest locations receives a portion of the pattern where this portion does not contain a repeated sub-pattern, enabling unique determination of the tip's 3D location.