Patent ID: 9122351
Filing Date: 2015-09-01
Classification: G06F,G09B

Abstract:
1. An apparatus comprising: a housing configured to attach to a computing device, the computing device having at least one surface on which at least a portion is a touch-sensitive region to receive user input for the computing device; at least one image sensor array disposed in the housing in a position such that, when the housing is attached to the computing device, an image formed on the image sensor array includes: at least a portion of the surface of the computing device, a direct first view of an object near the surface, and a reflected second view of the object as reflected from the surface; a processor receiving, from the image sensor array, image data corresponding to the image and performing image analysis of the image data to determine attribute data for the object; and a communications interface configured to communicate the attribute data between the processor and the computing device; wherein the attribute data comprises a corrected distance between the object and the surface and wherein the corrected distance is computed by analysis of the image data by the processor to determine an apparent distance between the object and the surface, to determine a distance between the object and the image sensor array, and to scale the apparent distance in proportion to the distance between the object and the image sensor array.