Field-of-view fusion
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Field-of-view fusion

The Huawei does not only rely on innovative hardware for zooming, however. Computational imaging methods play an important role as well. Field-of-view fusion combines the optical zoom with super-resolution algorithms that stack multiple frames for increased levels of detail.

The system intelligently adapts to the zoom factor selected by the user. Up to a 3x zoom factor it only uses super-resolution on the primary camera. At zoom factors between 3x and 5x an image is captured with the tele lens for best possible detail. The areas around the edges of the 5x frame are then filled in using image data recorded with the primary camera. Detail in those areas is improved by reconstructing textures and fine detail using a deep learning algorithm.

This is quite impressive as white balance, focus and other camera parameters have to be in perfect sync for good results. At a 5x zoom factor only the tele camera is used. For even longer reach super-resolution is applied to the tele camera for a maximum 50x zoom factor.