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A line of sight estimation method and device

A line-of-sight estimation and coordinate technology, which can be used in computing, computer parts, image analysis, etc., to solve problems such as large errors in line-of-sight estimation and large parameter deviations.

Active Publication Date: 2020-01-07
BEIJING 7INVENSUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of the embodiments of the present invention is to provide a line of sight estimation method and device to solve the following problems in the related art: In the related art, line of sight estimation is based on a spherical model, and the estimated parameter deviation is large, resulting in line of sight Estimate error is large

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  • A line of sight estimation method and device

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Embodiment 1

[0069] An embodiment of the present invention provides a line of sight estimation method. The device for line of sight estimation includes a data processing terminal, at least one camera and at least one light source, and the light source may be an infrared light source. When the user's eyes are looking at a certain direction, the light source forms an image on the user's eyes, and the user's eyes are photographed by a camera to obtain an eyeball image, and then the data processing terminal performs image processing on the eyeball image, and provides The method uses an ellipsoid model to estimate the user's line of sight direction. Since the shape of the human eyeball is similar to an ellipsoid, the ellipsoid model is used to estimate the line of sight of the human eye, and the estimation error is small and the accuracy is higher.

[0070] see figure 1 , the method specifically includes the following steps:

[0071] Step 101: Take a photo of the human eye with a camera to o...

Embodiment 2

[0148] see Figure 5 , an embodiment of the present invention provides a line of sight estimation device, which is used to implement the line of sight estimation method provided in Embodiment 1 above, and the device includes:

[0149] The coordinate determining module 20 is used to obtain an eyeball image by taking pictures of the human eye through the camera, and determine the imaging coordinates of the pupil center and the corresponding light spot coordinates of the light source from the eyeball image;

[0150] The obtaining module 21 is used to obtain the reflection point coordinates corresponding to the light source according to the camera coordinates and the spot coordinates corresponding to the camera; according to the camera coordinates and the pupil center imaging coordinates, obtain the refraction point coordinates corresponding to the pupil center;

[0151] Build module 22, be used for setting up ellipsoid model to human eye;

[0152] The line-of-sight determination...

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Abstract

The present invention provides a line of sight estimation method and device, wherein the method includes: taking a picture of the human eye with a camera to obtain an eyeball image, determining the imaging coordinates of the pupil center and the spot coordinates corresponding to the light source from the eyeball image; Coordinates and spot coordinates, obtain the reflection point coordinates corresponding to the light source; obtain the refraction point coordinates corresponding to the pupil center according to the camera coordinates and pupil center imaging coordinates; establish an ellipsoid model for the human eye; according to the reflection point coordinates, refraction point coordinates, and spot coordinates , camera coordinates, the actual position of the light source, the imaging coordinates of the pupil center, combined with the ellipsoid model to determine the line of sight direction of the human eye. The present invention uses the ellipsoid model to estimate the line of sight. Since the shape of the eyeball is similar to an ellipsoid, the error of the parameters estimated by the ellipsoid model is very small. error, which improves the estimation accuracy.

Description

technical field [0001] The present invention relates to the technical field of eye movement tracking, in particular to a method and device for estimating a line of sight. Background technique [0002] Gaze is the direction in which the eyes are looking and represents the focus of a person's attention. Gaze tracking is one of the more active research topics at present, and it has great application potential in the fields of human-computer interaction and human cognitive science. The basis of gaze tracking is to estimate the direction of human gaze. [0003] At present, in related technologies, a 3D (three-dimensional) approximate spherical model based on the eyeball is used to estimate the line of sight. According to the coordinates of the center of the pupil and the reflection of the cornea, an infrared light source is used to generate a reflection point in the human eye. By tracking the relative position of the center of the pupil and the reflection of the cornea, Estimat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/70
CPCG06T7/70G06V40/18
Inventor 刘伟任冬淳宫小虎聂凤梅
Owner BEIJING 7INVENSUN TECH