Notice how the highlighted region shrinks at each step. The algorithm never examines points outside the narrowing window. In a balanced tree with nnn points, this takes about log4(n)\log_4(n)log4(n) steps. For a million points, that's roughly 10 steps instead of a million comparisons.
50MP main, 12MP ultrawide, 10MP 3x telephoto
。服务器推荐对此有专业解读
在 Android 平台上，由于原生支持 ByteArray，实现非常简单：使用类型别名直接映射，转换函数直接返回输入值，避免额外开销。
The architecture
Whereas the Flip is huge, the second-gen Polaroid Go is tiny. It weighs just over a pound and fits easily in the palm of my hand — which is saying a lot, given I’m petite and a little over five feet tall — making it the most portable instant camera on our list. If its images were more true to life and didn’t require you to sheild them from the light for about 15 minutes while developing, I’d call it the best instant camera for kids or travel.