Patent ID: 9019241
Filing Date: 2015-04-28
Classification: G06F

Abstract:
1. A method for generating calibration information for an optical imaging touch display device that includes at least one image capturing unit by utilizing the image capturing unit, a processor and a calibration tool, the calibration tool having a surface that is provided with a plurality of mark patterns, each adjacent pair of the mark patterns defining a pattern boundary therebetween, the calibration tool being disposed such that the pattern boundary between each adjacent pair of the mark patterns forms a predefined positional relationship with a corresponding predefined location on the optical imaging touch display device, a display panel of the optical imaging touch display device having a first side and a second side spaced apart from and parallel to each other, the image capturing unit being disposed at the first side of the display panel, the calibration tool being inclined relative to the second side of the display panel, said method comprising the steps of: (A) configuring the image capturing unit to capture an image of the surface of the calibration tool when the view of the calibration tool by the at least one image capturing unit is unobscured, so as to generate an image frame; (B) configuring the processor to perform edge detection on the image frame so as to determine a position of each of at least one detected pattern edge within the image frame; and (C) configuring the processor to generate the calibration information with reference to the position of each of said at least one detected pattern edge as determined in step (B) and the corresponding predefined location on the optical imaging touch display device, wherein step (C) includes the sub-steps of: