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Pupil center positioning method and pupil center positioning device

A center positioning and pupil technology, applied in the image field, can solve problems such as errors and achieve the effect of accurate positioning

Inactive Publication Date: 2015-07-29
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, when the eyes are turned to one side, the boundary of the entire iris will no longer be a full circle, but an ellipse whose major axis is shorter than the minor axis. At this time, it will be wrong to use the Hough circle to match

Method used

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  • Pupil center positioning method and pupil center positioning device
  • Pupil center positioning method and pupil center positioning device
  • Pupil center positioning method and pupil center positioning device

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Embodiment Construction

[0101]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0102] It should be noted that the pupil center positioning device in the embodiment of the present invention has all the functions described in the pupil center positioning method in the embodiment of the present invention, and can be a separate physical device or a device composed of several physical periods. It can also be a program loaded on a computer, which is not specifically limited here.

[0103] see figure 1 , an embodiment of the pupil cent...

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Abstract

The embodiment of the invention discloses a pupil center positioning method and a pupil center positioning device, which is used for positioning the pupil center quickly and accurately. The method disclosed by the embodiment of the invention comprises the steps of positioning an inner eye corner point of a target image, wherein the inner eye corner point an eye corner point at the near end of the nose in the horizontal direction; intercepting an eye region image in the target image according to the inner eye corner point; and calculating the gradient of pixel points in the eye region image according to difference in image gray scale of the eye region image, and determining the pupil center in the eye region image according to the gradient of the pixel points.

Description

technical field [0001] The invention relates to the image field, in particular to a pupil center positioning method and device. Background technique [0002] Pupil localization is the first and most important step in many computer vision applications. For example, face recognition, facial feature tracking, facial expression analysis, and iris detection and positioning are also inseparable from pupil positioning. The positioning accuracy of the pupil center will directly and profoundly affect the next processing and analysis. In terms of fatigue driving applications, the automatic recovery of human eye position and state is also an important research topic. [0003] The first step in gaze tracking is to locate the pupil center. Gaze-tracking systems provide a powerful analytical tool for real-time cognitive processing and information transfer. There are roughly two important application areas for gaze tracking: diagnostic analysis and human-computer interaction. Eye-trac...

Claims

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Application Information

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IPC IPC(8): G06K9/32
Inventor 盛斌夏立殷本俊方奎
Owner HUAWEI TECH CO LTD
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