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this post was submitted on 30 Apr 2024
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If it's radar based it should be very reliable. The big issue is camera based stuff. Cameras can't measure much, only colour and brightness. From this everything is inferred not measured. Inferring things isn't inherently bad, but the errors need to be accurately known and considered. They probably are, it's just they are not weighted correctly relative to cost.
Stereoscopic camera systems exist and they can work very well (like on my ten year old car).
They still don't measure distance, they only infer it by comparing two images. This still has the same issue. It's just a more reliable way to infer distance than a single camera. It also requires less processing, hence it was popular for earlier computer vision applications.