Method of detecting visual stress and photosensitive epilepsy triggers in video and mitigation device

摘要

Embodiments of the invention include a method for detecting visual stress scenes in a video. First, a video that includes scenes that may cause visual stress in some viewers is received. Then, a signal representing human perceptual response from scenes in the video is generated. An envelope follower is applied to the perceptual response, from which indications that the video contains visual stress scenes may be generated. The output may also be used to control a contrast limiting circuit, which modifies the original video to remove or minimize those scenes that may cause visual stress. Additionally, output from the envelope follower may be converted to a simulated EEG signal and used to verify accurate modeling by comparing the simulated EEG signal to one measured directly from a viewer watching the same video.

主权项

1. A method for detecting visual stress scenes in a video, the method comprising:
receiving a video including scenes that may cause visual stress in some viewers; generating a signal representing human perceptual response from scenes in the video, including:
passing the video through a spatiotemporal filter, andgenerating a perceptual contrast portion of the perceptual response signal based on a function of a center area, a surround area, and a difference between the center and surround areas of the video; applying an envelope follower to the perceptual response signal; and indicating the video contains visual stress scenes based on the output of the envelope follower.