<story><title>Why Tesla removed radar and ultrasonic sensors [video]</title><url>https://www.youtube.com/watch?v=_W1JBAfV4Io</url></story><parent_chain><item><author>petilon</author><text>I didn&amp;#x27;t find his answers particularly convincing. His answer focused on costs mainly, and how &amp;quot;the best part is no part&amp;quot;. We have already seen multiple accidents caused by camera&amp;#x27;s limitations [1] which would not have happened if Tesla used Lidars.&lt;p&gt;Cameras have poor dynamic range and can be easily blinded by bright surfaces. While it is true that humans do fine with only eyes, our eyes are significantly better than cameras.&lt;p&gt;More importantly, expectations are higher when an automated system is driving the car. It is not sufficient if, in aggregate, self-driving cars have fewer accidents. If you lose a loved one in an accident where the accident could have been easily avoided if a human was driving, then you&amp;#x27;re not going to be mollified to hear that in aggregate, fewer people are being killed by self-driving cars! You&amp;#x27;d be outraged to hear such a justification! The expectation therefore is that in each individual injury accident a human clearly could not have handled the situation any better. Self-driving cars have to be significantly better than humans to be accepted by society, and that means it has to have better-than-human levels of vision (which lidars provide).&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=X3hrKnv0dPQ&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=X3hrKnv0dPQ&lt;/a&gt;</text></item></parent_chain><comment><author>aeternum</author><text>The dynamic range is the reason Tesla know counts photons rather than use traditional camera processing.  They basically remove the concept of exposure entirely and simply pass the sensor photon counts to the neural net.&lt;p&gt;This approach not only simpler as it removes photo processing&amp;#x2F;encoding but the result is that the NN can operate with a very high dynamic range similar to the human eye and in many cases can be sensitive on the single-photon level.</text></comment>
<story><title>Why Tesla removed radar and ultrasonic sensors [video]</title><url>https://www.youtube.com/watch?v=_W1JBAfV4Io</url></story><parent_chain><item><author>petilon</author><text>I didn&amp;#x27;t find his answers particularly convincing. His answer focused on costs mainly, and how &amp;quot;the best part is no part&amp;quot;. We have already seen multiple accidents caused by camera&amp;#x27;s limitations [1] which would not have happened if Tesla used Lidars.&lt;p&gt;Cameras have poor dynamic range and can be easily blinded by bright surfaces. While it is true that humans do fine with only eyes, our eyes are significantly better than cameras.&lt;p&gt;More importantly, expectations are higher when an automated system is driving the car. It is not sufficient if, in aggregate, self-driving cars have fewer accidents. If you lose a loved one in an accident where the accident could have been easily avoided if a human was driving, then you&amp;#x27;re not going to be mollified to hear that in aggregate, fewer people are being killed by self-driving cars! You&amp;#x27;d be outraged to hear such a justification! The expectation therefore is that in each individual injury accident a human clearly could not have handled the situation any better. Self-driving cars have to be significantly better than humans to be accepted by society, and that means it has to have better-than-human levels of vision (which lidars provide).&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=X3hrKnv0dPQ&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=X3hrKnv0dPQ&lt;/a&gt;</text></item></parent_chain><comment><author>lostsock</author><text>That video is from 2020, but Tesla didn&amp;#x27;t remove radar until 2021. Meaning that the crash occurred with radar still active, which I feel just backs up what Karpathy was saying.</text></comment>