Sight tracking and calibrating system for low-vision driver

Abstract

The invention relates to a sight tracking and calibrating system for a low-vision driver, in particular to a telescope scanning point tracking and calibrating system for a low-vision driver wearing a typoscope. The application of the system can provide object and accurate sight tracking data for researching driving behaviors of the low-vision driver. The system comprises a video monitoring system, a typoscope calibrator system, a windshield glass image reflecting system and a computer software control system. A laser transmitter is adopted to position a calibrating point, and the position of the calibrating point in a road scene image is automatically detected by using a video image processing method. An infrared reflecting label is pasted on a typoscope spectacle frame to track the moving direction of a typoscope telescope. The calibrating method has nothing to do with low-vision driving and can be completed by an operator to replace the driver. The system not only can be used for calibrating the scanning point tracking of the telescope of the driver with the typoscope, but also can be conveniently applied to a calibrating process of a driving environment, and the low-vision driver does not need to join in the calibrating process.

Description

technical field [0001] The invention relates to a driver's line-of-sight tracking and calibration system, especially a telescope aiming point tracking and calibration system for low-sighted drivers wearing vision aids. The application of this system can provide a basis for the research on driving behavior of low-sighted drivers. Objective and accurate gaze tracking data. Background technique [0002] As people live longer, so does the number of people with age-related low vision. According to the 2000 U.S. Census, an estimated 2.4 million U.S. adults had low vision (corrected best vision of less than 20 / 40). Many people lose the opportunity to drive because they cannot meet vision requirements, impacting quality of life. It has been used as a vision aid since the 1950s, and it has been used for driving since the 1960s. The loss of vision can be compensated for by the magnification provided by the vision aid telescope. Currently, 39 states in the United States allow peopl...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the limitations of the existing eye-tracking calibration method on the computer screen and the shortcomings that require more calibration points and cannot be carried out in the actual driving environment, the purpose of the present invention is to provide a new eye-tracking calibration method. The method can not only be used for the calibration of the telescope aiming point tracking of the vision aid driver, but also can be conveniently applied to realize the calibration process in the driving environment, which can be completed by the operator instead of the low-vision driver, without the need for low-power drivers Participate in the calibration process

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