Monocular distance-measuring method and system based on human eye positioning

Abstract

The invention discloses a monocular distance-measuring method and system based on human eye positioning. The method comprises the steps that a human face image is collected through a camera carried by a mobile terminal, and the image is preprocessed; human face detection and human eye positioning are carried out on the preprocessed image, and the circle center coordinate positions of the two pupils are obtained; the distance from the human eye to a screen of the mobile terminal is obtained by combining the circle center coordinate positions, the actual interpupillary distance and the focal length and through a geometric similarity method. The monocular distance-measuring method and system based on human eye positioning can remind a user of the mobile terminal to keep a correct posture and an appropriate distance from the user to the electronic screen, and prevent myopia.

Description

Technical field [0001] The present invention relates to the field of distance measurement of mobile terminals, in particular to a monocular distance measurement method and system based on human eye positioning. Background technique [0002] With the popularization of mobile electronic devices such as smart phones and tablet computers, people who use mobile electronic devices for a long time can cause eye fatigue, especially young people who do not pay attention to keeping the distance of watching electronic screens, which can easily lead to myopia. Existing anti-myopia products mainly use physical massage to relieve eye fatigue and correct sitting posture to achieve the purpose of prevention, such as anti-myopia glasses and "good back and back", but these methods have the following defects: [0003] 1. Do not remind the user to keep a proper distance to watch the screen of the electronic device in the application; [0004] 2. Mobile electronic devices are small in size and easy to c...

AI Technical Summary

Problems solved by technology

[0003] 1. In the application, the user cannot be reminded to keep an appropriate distance to watch the screen of the electronic device;

[0004] 2. Mobile electronic devices are small in size and easy to carry. Users can use them in various postures on various occasions. It is difficult to correct the sitting posture;

[0005] 3. These anti-myopia products are inconvenient to carry

[0007] 1. Ultrasonic ranging, laser ranging, binocular ranging and other methods require higher hardware devices, such as infrared emitters, laser emitters, and 3D binocular stereo cameras, while general mobile electronic devices do not have these hardware, It is difficult to apply these several technologies;

[0008] 2. The fixed-focus method relies on the accurate calibration of the camera model and has high technical requirements;

[0009] 3. The dual-focus method requires a camera that can physically zoom. Generally, electronic devices are small and thin, and the cameras generally do not have a physical zoom function;

[0010] 4. The defocusing method requires complex analysis of the image, such as judging the blur of the image, performing interpolation calculations for edge detection and width calculation, which is not suitable for real-time distance measurement, and has high performance requirements for the system

[0011] In the existing mobile electronic devices, there is no technology to measure the viewing distance through the monocular distance measurement method to prevent myopia

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