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Comment by improbableinf | Hacker News Reader

“You can count calories and sugar content of the meal using just a camera”

“You can have a full self driving car with just a few cameras”

In a way both things are very much similar and the real accuracy is more of a fiction than reality.

Self driving car is far more plausible, we drive cars with visual input alone. But a camera can't chemically analyse the insides of your dish.

That’s exactly the point. We drive cars with visual input alone and have so many crashes, injuries and deaths every day.

An average person experiences very little car-related crashes, injuries and deaths every day.

> we drive cars with visual input alone.

That's unlikely. Try driving in a snowstorm, where visual inputs become effectively useless, and you quickly realize how much the motion inputs are factored in as well.

Ok, but motion inputs are even easier to record.

With the right sensors. Difficult to determine with visual input alone.

But with the right sensors you can figure out the chemical composition of food too, so...

They are very different problems. You can attach every kind of sensor to the phone and get HD images, lidar scan, 3D model, heat signature and whatever other signal you want, but you still won't be able to figure out calories in a piece of food without breaking it apart at a molecular level. There's just too much hidden information. What sensor will tell you how many tablespoons of oil the chef used to fry onions for the sauce? Heck the chef himself probably won't be able to tell you.

Hyperspectral camera?

I legitimately drove full month with near zero interventions in FSD. The second statement is achievable in my opinion. Most people have not experienced hw4 with latest releases.

FSD with just cameras for input breaks down in times of low visibility (fog, smoke, heavy rain). That’s a straightforward fact

That's an interesting comment, but I have driven in heavy rain, and it worked just fine. Can you share how you arrived at your conclusion? I mean there is a limit to where the obstruction is so intense that even human cannot drive I get that but its actually performing fine for me in heavy rain that is still drivable for a human.

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