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Intelligent display system automatically tracking head posture

A head posture and automatic tracking technology, applied in the field of intelligent recognition, can solve the problems of large impact of lighting on facial expressions, high image quality requirements, and low accuracy, and achieve the effects of protecting eyesight, improving usability, and wide viewing angle

Active Publication Date: 2014-02-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Generally speaking, the method based on prior rules has a low accuracy rate, high requirements on image quality, and is greatly affected by facial expressions and posture lighting, but sometimes it also has the advantage of a small amount of calculation, and is suitable for combining with other methods for feature point positioning

Method used

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  • Intelligent display system automatically tracking head posture

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Experimental program
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Effect test

Embodiment 1

[0038] When using a computer, the user is most likely to have a tilted head posture, which causes the face to deviate from the best line of sight position. The tilting posture refers to the posture in which the head axis deviates from the vertical position when the head swings left and right, such as Figure 4 shown in the middle figure. The system provided in this embodiment can make the display follow the change of the tilting posture of the head of the human body to realize automatic tracking, so that the display can always maintain the best line of sight position with the head.

[0039] The system includes an image acquisition module, a visual algorithm processing module and a display control module. The image acquisition module is a monocular camera 1 with a resolution of 640×480; the visual algorithm processing module is composed of a computer host and its peripheral circuits; the display control module includes a display, a tilt steering gear 5, a steering gear control...

Embodiment 2

[0059]In practice, the head posture is the coupling of roll, pitch and side rotation. In order to further improve the performance of the system, the adjustment of the pitch posture is added in this embodiment (the side rotation posture is not a conventional posture when using a computer, here ignore); that is, the roll attitude and the pitch attitude are considered at the same time, and the attitudes of these two degrees of freedom are analyzed independently. The pitching attitude refers to the attitude in which the angle formed by the head axis and the computer plane is not zero, such as Figure 4 shown in the figure on the right.

[0060] Based on this, in the system described in Embodiment 1, a pitch steering gear, a binocular camera pair formed by the left eye camera 2 and the right eye camera 3, and the pitch steering gear are added. The resulting intelligent display system that automatically tracks the head posture is as follows: figure 2 As shown, the system can make...

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Abstract

The invention relates to an intelligent display system automatically tracking a head posture. The system can capture the head posture of a human body in real time, a display follows the head of the human body, the display and the head are constantly kept at optimum positions, eye fatigue can be relieved, and myopia can be prevented. The system comprises an image acquisition module, a vision algorithm processing module and a display control module. The image acquisition module is used for acquiring the image of the head of the human body in real time; the vision algorithm processing module is used for firstly preprocessing the image, constantly keeping the head at a vertical position in the image, secondly extracting feature points of a human face by the aid of an ASM (active shape model) algorithm, and finally acquiring the spatial posture of the head according to the triangular surveying principle of elevation angles and side-tipping angles. Head posture information is transmitted to a steering gear control module and then calculated by a single chip microcomputer to form a PWM (pulse width modulation) signal for controlling a steering gear, so that the display follows the head posture at two degrees of freedom of elevation and side-tipping.

Description

technical field [0001] The invention relates to an intelligent display system, in particular to an intelligent display system for automatically tracking the posture of a head, and belongs to the technical field of intelligent recognition. Background technique [0002] As an indispensable human-computer interaction terminal for computers, monitors can be seen everywhere in our work and life. The current display posture (that is, the viewing angle) can only be adjusted manually, and cannot be adjusted automatically according to the change of the user's head posture. The horizontal and clear visual field of the human eye is 35°, and the vertical clear visual field is 20°. The change of head posture changes the area of ​​clear vision; at this time, if the posture of the monitor remains unchanged, it is difficult to have clear vision and it is easy to cause eye fatigue. However, frequent manual adjustments are not only cumbersome, but also cannot ensure that the monitor is exac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01G05D3/00
Inventor 付梦印陈尧宋文杰陈芃润唐弘毅
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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