| CPC G06T 7/80 (2017.01) [G06T 7/13 (2017.01); H04N 7/186 (2013.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01); H04N 23/58 (2023.01); H04N 23/611 (2023.01); H04N 23/81 (2023.01)] | 20 Claims |
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1. An electronic doorbell comprising:
a lens having a lens optical axis and providing an image circle representing a scene captured by the lens, the image circle having an upper portion and a lower portion separated by a middle portion and arranged in a vertical stack, the upper portion located proximate to an upper edge of the image circle, the lower portion located proximate to a lower edge of the image circle;
an image sensor having a sensor detection area, the image sensor being:
positioned in a portrait orientation relative to the vertical stack of portions of the image circle, the portrait orientation of the image sensor causing the sensor detection area to have a vertical dimension that is greater than a horizontal dimension; and
vertically shifted relative to the lens toward the lower portion of the image circle by an offset distance from the lens optical axis to enable the image sensor to capture an image of an object located in the lower portion of the image circle proximate to the lower edge of the image circle, the sensor detection area having a rectangular shape and including two upper corners located within the image circle and two lower corners located outside of the image circle; and
a processor configured to perform lens distortion correction on an image captured by the image sensor, the lens distortion correction including removal of black areas in lower corner areas of the captured image corresponding to the two lower corners of the sensor detection area that are outside of the image circle.
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