CAMERA PHASE DETECTION AUTO FOCUS (PDAF) ADAPTIVE TO LIGHTING CONDITIONS VIA SEPARATE ANALOG GAIN CONTROL

摘要

A camera image sensor captures imaging pixel data and focus pixel data. The camera determines an imaging analog gain based on the imaging pixel data, and determines a focus analog gain based on the focus pixel data. When capturing the one or more subsequent frames, the image sensor applies the imaging analog gain to the imaging pixels and applies the focus analog gain to the focus pixels. Optionally, applying the focus analog gain to the focus pixels brings an average focus pixel luminance within a range, or brings a phase disparity confidence above a threshold.