Calibrating method for single camera virtual mouse system

A technology of camera coordinate system and virtual mouse, which is applied in the field of calibration of single-camera virtual mouse system, can solve the problems of complex calibration process, small field of view, poor real-time performance, etc., achieve high calibration efficiency, improve real-time performance, and simple algorithm Effect

Inactive Publication Date: 2007-06-06
HUANGSHI BANGKE TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

This kind of virtual mouse system has high cost, small field of view, complicated system calibration process, large amount of calculation, and poor real-time performance.

Method used

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  • Calibrating method for single camera virtual mouse system
  • Calibrating method for single camera virtual mouse system
  • Calibrating method for single camera virtual mouse system

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Embodiment

[0100] Using Logitech QuickCam Pro 5000 USB 2.0 color camera and 15-inch LCD liquid crystal display to form a single-camera virtual mouse system, the camera lens is a wide-angle lens, and the working distance is greater than 10cm. The image sensor of the camera is a CMOS chip with a resolution of 300,000 pixels, a dynamic resolution of 640×480 pixels, and a maximum frame rate of 30 frames per second. The physical size of the computer display screen is a 15-inch liquid crystal display, the aspect ratio is 4:3, the display resolution is 1024×768 pixels, the square of the virtual target 2 is 60×60 pixels, and the physical size of the actual size is 17.859×17.859 mm.

[0101] The parameters of the single-camera virtual mouse system are calibrated by using a two-dimensional plane solid target 1 as shown in FIG. 1 . The number of squares in the physical target is 8×8, and the size of the squares is 17.859×17.859mm, which is printed by a 1200dpi high-resolution laser printer.

[01...

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Abstract

The invention provides a calibration method of the model parameter for the single camera dummy mouse system. It bases on the two-dimension entity drone and the two-dimension dummy drone. The entity drone coordinate system is as the agency to get the equation of the screen plane of the non-visible field in the camera coordinate system. At the same time it sets the mapping relation of the figure coordinate of projection point which is the three-dimension control point in single camera dummy mouse system and the screen coordinate. The screen coordinate is input into the computer system to control the computer. The method does not need the assistant adjusting device and is easy to operate, has the high calibration ratio. So it has improved the available visible field and the operation time.

Description

technical field [0001] The invention belongs to the technical field of machine vision and relates to a calibration method for a single-camera virtual mouse system. Background technique [0002] With the continuous development of human-computer interaction technology, more and more shortcomings of wired and wireless practical tangible mice have been exposed, which greatly limit the speed, distance and naturalness of interaction. In recent years, cameras have been used to capture images of control points in space. By tracking and analyzing the image coordinates of the control points and corresponding to the coordinates of the computer screen, they are provided to the computer system as user input and function as a real mouse. A mouse based on the principle of machine vision is called a virtual mouse. The virtual mouse is characterized by no radiation and no contact, which greatly reduces the cognitive load of human-computer interaction and effectively realizes the rapidity an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/00G06T7/00
Inventor 周富强李伟仙张鲁闽杨晓科
Owner HUANGSHI BANGKE TECH CO LTD
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