Patent and Trademark Office on Thursday, describe a billboard that has sensors including cameras, microphones and even retina scanners built in or positioned nearby.“Image or video data may be processed to determine whether any individuals looked directly at the advertising content (e.g., using image recognition and/or eye tracking techniques),” said the patent documents, which use much of the same language in describing the technology.
Verbal reactions by passersby could be collected via microphones.
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