PureView digital zoom is more common than you might think

Think back to one of the original tenets of Nokia's 'PureView' system, designed to accomplish lossless digital zoom using a high resolution sensor to 'smart crop' into, in a seamless way, exemplified in the Nokia 808 and Lumia 1020, but also found in the Lumia 930, 1520 and 950 range. Is this all patented, or can other manufacturers and developers leverage the exact same idea? In playing with my Android-powered ZTE Axon 7, I discovered that the exact same idea is already used when zooming on non-Nokia/non-Microsoft phones, and it works just as well. Who knew?

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