Multipoint touch screen system realizing method and device based on computer vision technology
A multi-touch screen, computer vision technology, applied in the input/output process of computing, data processing, instruments, etc., can solve the problem of not being able to realize multi-touch
Inactive Publication Date: 2014-12-24
GUILIN UNIV OF ELECTRONIC TECH
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However, the above-mentioned system can only track a single finger and extract the fingertip because the above-mentioned system calculates the position of the fingertip and tracks the fingertip point through the particle filter algorithm to realize the touch function on the ordinary display screen. Realize multi-touch function
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[0055] Below in conjunction with specific illustration, further set forth the present invention:
[0056] refer to figure 1 , the present invention is based on computer vision technology multi-point touch screen system device is composed of 3 groups of cameras, an image processing device and a common display screen. The output terminals of the three groups of cameras in the figure are all connected to the image processing device. A set of horizontal cameras pointing to the frame of the display screen are placed on the left and right ends of the display screen. When a finger enters the viewing range of the camera, it can be judged whether there is a touch according to the distance between the fingertip and the display screen. A group of vertical cameras are placed in front of the display and point to the display and the entire display is within its viewing range. When a touch occurs, the position of the fingertip can be obtained according to the image captured by the camera, a...
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The invention discloses a multipoint touch screen system realizing method and a device based on computer vision technology, wherein the system device is composed of three groups of cameras, an image processing device and a common display screen; the output ends of the three groups of cameras are connected on the image processing device; a group of horizontal cameras pointing to the display screen frame is respectively arranged on the left and right ends of the display screen; if a finger enters framing ranges of the cameras, whether a touch is generated is judged according to the distance between the finger tip and the display screen; a group of vertical cameras pointing the to the display screen and locating the whole display screen in the framing ranges thereof is arranged in front of the display screen; if the touch is generated, a finger tip position is obtained according to images picked up by the cameras, and the finger is simultaneously tracked; and the image processing device is used for processing the images picked up by the cameras to obtain the position of the finger tip touch point and finger action information, and converting the finger action information into a corresponding command to finish a touch operation.
Description
technical field [0001] The invention relates to the technical field of touch screens, in particular to a method for realizing a multi-point touch screen system based on computer vision technology. Background technique [0002] As the latest computer input device, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. It endows multimedia with a new look and is a very attractive new multimedia interactive device. In current market applications, touch screens mainly include four types: resistive, capacitive, surface acoustic wave, and infrared touch screens. Resistive and capacitive touch screens can only be used in small and medium-sized touch screens due to cost reasons. Although the infrared touch screen is cheap and fast in response, its resolution is low and it is easily interfered by external strong light. The surface acoustic wave touch screen solves the problem of the infrared touch screen, but it is easily affecte...
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IPC IPC(8): G06F3/042
Inventor 张红梅陈俊彦叶进张向利张全君吴阿沛
Owner GUILIN UNIV OF ELECTRONIC TECH