Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Space geometrical quantity measurement method of using sight fixation points of free space

A free space, gaze point technology, applied in radio wave measurement systems, measurement devices, surveying and mapping and navigation, etc., can solve problems such as difficult to achieve line of sight tracking in free space

Inactive Publication Date: 2017-06-13
TIANJIN UNIV
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of device can already obtain high line-of-sight tracking accuracy, but it is difficult to achieve line-of-sight tracking in free space because the human eye is constrained in a fixed space

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Space geometrical quantity measurement method of using sight fixation points of free space
  • Space geometrical quantity measurement method of using sight fixation points of free space
  • Space geometrical quantity measurement method of using sight fixation points of free space

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] figure 1 It is a structural schematic diagram of the measurement system used in the present invention. The whole measurement system includes a glasses-type frame with a left-eye frame and a right-eye frame, two half-transparent mirrors fixed on the glasses-type frame, and a binocular stereo vision line-of-sight tracking camera. , at least one scene camera and a pose measurement component, wherein the binocular stereo vision line of sight tracking camera includes two sets of line of sight tracking binocular cameras, and two half-transparent mirrors are respectively fixed in the left-eye frame and the right-eye frame, Next to each half-mirror, a set of the line-of-sight tracking binocular camera is set to face the eyes for imaging through reflection; the scene camera is fixed on the glasses-type frame for imaging the scene; The pose measurement component includes a pose measurement sensor composed of a three-axis gyroscope and an inclinometer and a GPS module, and the pos...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a space geometrical quantity measurement method of using sight fixation points of a free space. The method comprises the steps of obtaining an image of a measured object by using a scene camera; determining space coordinates of a pupil center for each group of sight tracking binocular cameras; defining a normal direction of a plane in which pupils through the pupil center are located as the sight direction, and determining sight direction expressions for a left eye and a right eye separately; obtaining coordinates of fixation points; obtaining invariable geodetic coordinates of the fixation points through real-time pose transformation of a pose measurement assembly according to the characteristics that the coordinates of the fixation points in a geodetic coordinate system of the measured space are invariable; and after carrying out sight operation on the measured object for multiple times, obtaining space coordinates of multiple points of a body surface, calculating the distances among the points separately, and completing space geometrical quantity measurement of the measured object by combining an image of a scene camera.

Description

technical field [0001] The invention relates to the fields of sight tracking and space geometry measurement. Background technique [0002] Gaze tracking technology has important use value in the fields of human-computer interaction and virtual reality, and can greatly expand the user's operating ability. The non-contact eye tracking technology based on machine vision includes two parts: (1) line of sight feature parameter extraction, that is, the position of the eye in the image, usually represented by the center of the pupil or iris; (2) line of sight direction modeling, that is, by the detection To track the eye feature parameters to measure the gaze direction. Line-of-sight feature parameter extraction extracts pupil, iris and corneal reflection spots and other parameters that characterize eye movement from eye images through image processing. Among them, pupil tracking is an important step in the detection of gaze feature parameters. The establishment of gaze directio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/08G01C21/00G01S19/45
CPCG01C11/08G01C21/005G01S19/45
Inventor 王向军万子敬
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com