Pupil localization method and device, apparatus, and storage medium

An apparatus comprising:

• one or more processors;
• and
• a memory for storing one or more programs,
• wherein the one or more programs, when executed by the one or more processors, causes the one or more processors to perform following processes:
• preprocessing a pupil image;
• generating a first projection curve and a second projection curve on horizontal and vertical axes of two-dimensional coordinate axes respectively according to the preprocessed image;
• determining a first pair of dividing points and a second pair of dividing points on the first projection curve and the second projection curve respectively according to a pre-configured threshold;
• and
• determining center coordinates of the pupil according to the first pair of dividing points and the second pair of dividing points;
• wherein the pre-configured threshold comprises a preconfigured horizontal axis threshold and a pre-configured vertical threshold,
• said determining a first pair of dividing points and a second pair of dividing points on the first projection curve and the second projection curve respectively according to a pre-configured threshold comprises determining the first pair of dividing points on the first projection curve according to the preconfigured horizontal axis threshold, and determining the second pair of dividing points on the second projection curve according to the pre-configured vertical threshold, and
• said determining center coordinates of the pupil according to the first pair of dividing points and the second pair of dividing points comprises determining a horizontal coordinate of a center of the pupil based on an average of horizontal coordinates of the first pair of dividing points and determining a vertical coordinate of the center of the pupil based on an average of vertical coordinates of the second pair of dividing points.

A storage medium on which a computer program is stored, the program, when executed by one or more processors, causes the one or more processors to perform following processes:

• preprocessing a pupil image;
• generating a first projection curve and a second projection curve on horizontal and vertical axes of two-dimensional coordinate axes respectively according to the preprocessed image;
• determining a first pair of dividing points and a second pair of dividing points on the first projection curve and the second projection curve respectively according to a pre-configured threshold;
• and
• determining center coordinates of the pupil according to the first pair of dividing points and the second pair of dividing points;
• wherein the pre-configured threshold comprises a preconfigured horizontal axis threshold and a pre-configured vertical threshold,
• said determining a first pair of dividing points and a second pair of dividing points on the first projection curve and the second projection curve respectively according to a pre-configured threshold comprises determining the first pair of dividing points on the first projection curve according to the preconfigured horizontal axis threshold, and determining the second pair of dividing points on the second projection curve according to the pre-configured vertical threshold, and
• said determining center coordinates of the pupil according to the first pair of dividing points and the second pair of dividing points comprises determining a horizontal coordinate of a center of the pupil based on an average of horizontal coordinates of the first pair of dividing points and determining a vertical coordinate of the center of the pupil based on an average of vertical coordinates of the second pair of dividing points.