Sight tracking system suitable for human-computer interaction and based on system on programmable chip (SOPC)

Abstract

The invention discloses a sight tracking system suitable for human-computer interaction and based on a system on programmable chip (SOPC). The system comprises a simulation camera, an infrared light source and an SOPC platform. The camera inputs a collected simulation image into the SOPC platform, the simulation image is stored to be a digital image through a decoding chip, a hardware logic module is adopted to achieve an Adaboost detection algorithm based on the haar characteristic, detection of a human eye area is conducted on the image, a random sampling consistency oval fitting method is further utilized to conduct pupil accurate location to further obtain a sight vector, and a sight vector signal is transmitted to a computer through a universal serial bus (USB) to achieve human-computer interaction. The system achieves human eye area detection and pupil center extraction through hardware, finally achieves human-computer interaction, has good accuracy and real-time performance and achieves device miniaturization.

Description

technical field [0001] The invention relates to the technical field of human-computer interaction, in particular to a line-of-sight tracking system suitable for human-computer interaction based on SOPC. Background technique [0002] Gaze tracking technology has the advantages of directness, bidirectionality and naturalness in human-computer interaction, and has become a key technology of future intelligent human-computer interface. The current eye-tracking technology can be mainly divided into two types: contact type and non-contact type. Non-contact tracking has high precision, but the user needs to wear a special device on the head, which brings inconvenience to use and is relatively expensive. The non-contact type brings a fully free user experience. The mainstream solution is to obtain the user's eye image through the camera, and obtain the user's line of sight direction through image processing technology. The current research on non-contact eye-tracking technology ma...

AI Technical Summary

Problems solved by technology

The current research on non-contact eye tracking technology mainly focuses on the prototype algorithm, which has met certain accuracy and robustness. The bottleneck of its application and promotion lies in high performance, miniaturization, low power consumption and low cost eye tracking equipment.

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