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Device and method for realizing eye-tracking of virtual display screen by utilizing cross-ratio invariance

A virtual display screen and eye-tracking technology, which is applied in optics, instruments, character and pattern recognition, etc., can solve the problem of inaccurate eye-tracking tracking, achieve the effect of eye-tracking, improve tracking accuracy and tracking efficiency

Active Publication Date: 2018-08-17
BEIJING 7INVENSUN TECH
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Problems solved by technology

[0003] The object of the present invention is to provide a device and method for realizing visual tracking of a virtual display screen by using cross-ratio invariance. accurate question

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  • Device and method for realizing eye-tracking of virtual display screen by utilizing cross-ratio invariance
  • Device and method for realizing eye-tracking of virtual display screen by utilizing cross-ratio invariance
  • Device and method for realizing eye-tracking of virtual display screen by utilizing cross-ratio invariance

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0047] For the concept explanation and plan summary of the light spot, light source, virtual light source, display screen and virtual display screen in the present invention: the light spot is the image reflected by the infrared light source on the front surface of the cornea, and is the image formed by the reflection of all optical interfaces in the eye The most observable image in , also known as the first Pukino image. In the device of the present invention, four light sources are arranged at fixed positions near the display screen, but when using the cross-ratio invariance to solve the viewpoi...

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Abstract

The invention provides a device and method for achieving eye-tracking of virtual display screens by means of crossratio invariability. The device comprises the virtual display screens. Four auxiliary light sources and one camera are arranged for each virtual display screen, wherein the four auxiliary light sources are located on the left side and right side of the display screen to form a rectangle, and the camera is located below the display screen. The method comprises the steps of acquiring the pupil center and light spot position of an image through an image processing module, estimating the positions of the light sources in the screens through calibration by means of an eye-tracking module, and calculating a viewpoint according to the light sources, the pupil center and the light spot position. Based on the one camera and four light sources for each display screen, the positions of the virtual light sources in the virtual display screens are estimated through calibration, and eye-tracking is achieved by means of crossratio invariability.

Description

technical field [0001] The present invention relates to the technical fields of computer vision, image processing, and photographic geometry, and in particular to a device and method for realizing visual tracking of a virtual display screen by utilizing cross-ratio invariance. Inaccurate gaze tracking issues. Background technique [0002] At present, gaze tracking is usually carried out at a relatively long distance from the eyes. The tracking method is usually obtained by obtaining images of the eyes, and then comparing and calculating according to a certain algorithm. This method generally requires the device for capturing eye images to be fixed, but for wearable devices and other devices with virtual display screens, since the distance between the eyes and the image capture device is relatively close, and both the virtual display screen and the image capture device are Located on a device (such as a wearable device), the device can move, and there will be a displacement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G02B27/01
Inventor 任冬淳沈丁成黄通兵
Owner BEIJING 7INVENSUN TECH
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