Method and system for pupil tracing as well as correction method and module for pupil tracing

Abstract

The invention discloses a method and a system for pupil tracing as well as a correction method and a module for pupil tracing. The method for pupil tracing comprises the following steps: capturing an image of one user eye, wherein the image of one eye comprises a pupil image and two reflective point images; calculating an area parameter and an angle parameter based on the pupil and the two reflective points; marking the area parameter and the angle parameter on an angle-area plane graph to obtain original coordinates on the angle-area plane graph; and converting the original coordinates on the angle-area plane graph into display cursor coordinates by using a coordinates system conversion method. Since the eye moving range described by characteristic values (the area and the angle) of the invention is a rectangle, the conversion process of the coordinates is equivalent to the conversion of coordinates in two rectangles, and therefore, the error can be greatly reduced, and the pupil tracing accuracy can be improved.

Description

technical field [0001] The invention relates to a pupil tracking method, in particular to a pupil tracking method which uses a special coordinate transformation pre-technology to improve accuracy. Background technique [0002] Eye tracking technology is commonly used to control computers, and it can be developed as an assistive device for people with progressive frostbite or people with physical disabilities to communicate with the outside world through computers. This technology refers to tracking the movement of the eyeball, obtaining the coordinates or trajectory of the eyeball position, and then generating certain preset control instructions to the computer. Therefore, this technology must first be able to accurately detect the movement of the eyeball, and another important point is that it must be able to accurately convert the data required for the computer to generate control commands, such as converting the eyeball position to correspond to the position of the cursor...

AI Technical Summary

Problems solved by technology

However, the aforementioned calibration method not only has few calibration points, but also obtains the coordinates of most of the positions of the entire display screen by interpolation. As a result, once one of the calibration points deviates slightly, it will cause a wide range of error effects, and this will directly affect the The method of converting eyeball coordinates to display screen coordinates has not been verified to be better

[0007] It can be seen that no matter what kind of human eye tracking method the above-mentioned existing method obviously still has inconvenience and defects in the structure and use of the method and system, and needs to be further improved urgently.

In order to solve the above-mentioned existing problems, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time. This is obviously a problem that relevant manufacturers are eager to solve.

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