Pupil positioning method and apparatus, vr/ar apparatus and computer readable medium

A pupil positioning apparatus, comprising:

• an image acquisition processor configured to obtain an eye image under illumination of a light source;
• an internal point determination processor, configured to obtain a first internal point in a pupil of the eye image;
• a calculation processor, configured to calculate gradient changes of pixel points along a straight line starting from the first internal point toward outside of the pupil;
• a first edge point determination processor, configured to determine a pixel point having a gradient change that satisfies a preset condition as a first edge point at an edge of the pupil;
• a search processor, configured to search for a plurality of pixel points in the eye image having the same or similar gradient change as the gradient change at the first edge point, and set the plurality of pixel points as a second edge point to an Nth edge point, where N is a positive integer greater than 4;
• and
• a fitting processor, configured to perform ellipse fitting on the edge points from the first edge point to the Nth edge point to obtain a pupil center.

A pupil positioning apparatus, comprising:

• a display screen;
• a processor;
• and
• a storage medium coupled to the processor and storing a computer program that, when executed by the processor, causes the processor to:
• obtain an eye image under illumination of a light source;
• determine a first internal point in a pupil of the eye image;
• calculate gradient changes of pixel points along a straight line starting from the first internal point toward outside of the pupil;
• determine a plurality of edge points at an edge of the pupil based on the gradient changes of the pixel points along the straight line;
• and
• perform ellipse fitting on the edge points to obtain a pupil center.