But a simple histogram stretch can be done with very little processing power by modern standards. 50 ms on one core of the application processor would be enough

But a simple histogram stretch can be done with very little processing power by modern standards. 50 ms on one core of the application processor would be enough. I think they just chose bad examples. The results from this Google Research blog post are much much more impressive: https://research.googleblog.com/2017/04/experimental-nighttime-photography-with.html https://research.googleblog.com/2017/04/experimental-nightti... I wish my smartphone could do _that_ automatically.