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Large screen non contact type control mode

A non-contact, control technology, applied in the field of human-computer interaction of large-screen display, can solve the problems that the screen size cannot exceed the reach of the hand, limit the application range and screen size, and damage the splicing part, etc., so as to improve the service life and display effect of effect

Inactive Publication Date: 2004-10-06
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

But the touch control method itself limits its application range and screen size
First of all, the pen must touch the screen. This is not allowed for most screens. The screen will be scratched by the pen and leave marks. It will be severely damaged, and it requires special wear-resistant materials to be attached to the screen surface to protect the screen; secondly, the range of motion of the pen is directly limited by the reach of the human hand, so that the size of the screen cannot exceed the reach of ordinary people

Method used

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  • Large screen non contact type control mode

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Embodiment

[0031] The main indicators obtained on the basis of the above hardware are as follows:

[0032] The coincidence error of the cursor and the laser point: the coincidence error of the edge area of ​​each screen is less than 5 pixels (display resolution), the error of the center 2 / 3 screen area is less than 4 pixels, and the center 1 / 3 screen area is less than 2 pixels;

[0033] The delay of the cursor relative to the laser point: <40ms, the visual delay is not obvious;

[0034] ●Laser point real-time detection rate: >90%, good real-time performance;

[0035] ●The real-time detection program of the laser point and the direct drawing program of the laser pointer are normally running and the CPU usage rate is 1-4% (P4 2.4G);

[0036] ●Laser pointer working distance: within 10 meters; 15 meters (receiver plus USB extension cable);

[0037] ●Screen stitching error: <1 pixel.

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Abstract

A non-contact control method for large screen features that a laser pen is used to control screen operations, a red laser pen with wireless left and right mouse keys are used for realizing the functions of mouse, a camera head with red filter is used for picking the information about laser point and increasing S / N ratio, a video acquisition card is used for receiving the data from camera head and processing it to set up the position of system cursor, and a forward interpolation algorithm is used for moving cursor smoothly.

Description

technical field [0001] The invention relates to the field of human-computer interaction technology displayed on a large screen, and mainly relates to the technology of directly performing non-contact control on a large screen by using a red laser pointer with left and right buttons of a wireless mouse. Background technique [0002] With the advent of the information age, the interactive technology between people and information is playing an increasingly important role. Among them, the large-screen projection display system is one of the most modern video tools today. Due to its intuitiveness and super large characteristics, It has been widely used in various fields, especially military combat command, virtual reality and so on. [0003] The large-screen display system mainly includes a display control system, a projector system, and a screen wall system. [0004] The display control system is the control center of the entire large-screen projection display system. It respo...

Claims

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Application Information

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IPC IPC(8): G06F3/0354
Inventor 彭海良许光銮周强洪隆昌
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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