Optical multi-point touch positioning method
A positioning method and technology of touch points, which are applied in the directions of instruments, calculations, electrical digital data processing, etc., can solve the problems of multi-touch combination calculation complexity, high real touch point precise positioning, etc.
Active Publication Date: 2015-11-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
[0003] Purpose of the invention: the present invention mainly solves the problems of high computational complexity of multi-touch combination, elimination of "ghost points" and precise positioning of real touch points
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[0048] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0049] Embodiments of the present invention are implemented on the following hardware devices. This embodiment is only an example of the invention, and does not have any limiting effect on the present invention. Any hardware structure and software algorithm without essential modification are all within the protection scope of the present invention. In this example, three optical cameras are used for positioning. The three optical cameras are respectively placed in the upper left corner (A), upper right corner (C) and top center (B) of the touch area. See figure 2, each optical camera shoots synchronously at a speed of 120 frames per second, each touch point forms a corresponding light spot in the three optical cameras A, B, C, and the screen resolution is 1920×1080. The optical image is input into the computer, and the acquired spot image is denoised and di...
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The invention discloses a large-size multi-point touch positioning system based on multiple optical imaging. A method comprises the following steps: dividing a whole touch panel into a plurality of regions according to the property of an optical camera, and limiting each region by adopting three sets of angle combination, wherein about half of invalidly combined ghost points can be effectively eliminated while multi-point touch positioning is carried out through region division; then, setting an area threshold value of each region according to the distance from each region to optical imaging equipment, and effectively eliminating a part of touch ghost points by setting the threshold value; and finally, further eliminating possible touch points by adopting a method for matching various remained points with imaging angles of various optical equipment, and judging which various touch points are shaded in through the matching method, so that triangular positioning is carried out by effectively utilizing unshaded optical equipment. According to the invention, precise positioning can be carried out in multi-point touch applications of the plurality of optical equipment; and the problem of ghost points due to multi-point touch and multi-point imaging can be effectively eliminated.
Description
technical field [0001] The invention relates to the field of optical touch control technology and human-computer interaction technology, in particular to multi-point touch interaction technology. Background technique [0002] As a new type of computer input technology, fighter touch control technology makes human-computer interaction more intuitive. Because it brings great convenience to users, in addition to being applied to personal portable information products, it has been applied in information appliances, public information , electronic games, office automation equipment and other fields. Common touch control technologies include capacitive touch technology, resistive touch technology, infrared touch technology or optical touch technology, etc. Among them, optical imaging multi-touch interaction technology has always been a hot technology in the large-scale interactive industry, but this technology is affected by the multi-touch combination. High computational complex...
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IPC IPC(8): G06F3/042
Inventor 张海艳高尚兵骆威
Owner HUAIYIN INSTITUTE OF TECHNOLOGY