Image device auto exposure
AssigneeSnap Inc.
InventorsBo Ding, Dmitry Ryuma
Life of this patent
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Abstract
An auto exposure method for an image capture device includes the steps of gathering ambient light data using an ambient light sensor of the image capture device, selecting a frame rate corresponding to the gathered ambient light data, and determining an optimal image capture frame rate for the image capture device. The auto exposure method determines the optimal image capture frame rate by executing an auto exposure algorithm with a processor using the selected frame rate as an initialization parameter for the auto exposure algorithm.
Claims20
An auto exposure method for an image capture device having an ambient light sensor and an imager separate from the ambient light sensor, the method comprising:
- gathering ambient light data using the ambient light sensor of the image capture device;
- selecting a frame rate corresponding to the gathered ambient light data;
- determining optimal image capture parameters including sensor gain and exposure time for the imager of the image capture device by executing an auto exposure algorithm with a processor using the selected frame rate as an initialization parameter for the auto exposure algorithm and then using iteratively gathered imaging data from the imager by the auto exposure algorithm to determine the optimal image capture parameters for the imager, wherein the ambient light data corresponding to the selected frame rate is gathered prior to execution of the auto exposure algorithm.
An image capture device comprising:
- an ambient light sensor configured to gather ambient light data;
- an imager separate from the ambient light sensor and configured to capture an image;
- and
- a processor configured to determine an optimal image capture frame rate for the imager by executing the following steps:
- selecting a frame rate corresponding to the gathered ambient light data,
- determining optimal image capture parameters including sensor gain and exposure time for the image capture device by executing an auto exposure algorithm with a processor using the selected frame rate as an initialization parameter for the auto exposure algorithm and then using iteratively gathered imaging data from the imager by the auto exposure algorithm to determine the optimal image capture frame rate, wherein the ambient light data corresponding to the selected frame rate is gathered prior to execution of the auto exposure algorithm;
- wherein the imager is controlled by the processor to capture the image at the optimal image capture frame rate.
Dependencies are inferred from the claim text.