Method for estimating camera settings adaptively
View Patent ↗A camera is configured to adaptively determine camera settings. The camera includes a plurality of sensors elements configured to acquire a current image of a scene according to a current set of camera settings. A number of sensor elements having a set of desirable properties is measured. Then, a next set of camera settings that maximize an overall number of sensor elements having the set of desirable properties is determined to acquire a next better image.
1. A method for adaptively determining a set of camera settings, comprising the steps of:
acquiring an initial image of a scene with a camera including a plurality of sensor elements, the camera having an initial set of camera settings while acquiring the initial image;
measuring, from the initial image, a number of pixels in the initial image having a set of desirable properties;
estimating, for each of a plurality of next sets of camera settings, a set of estimated properties for each pixel in an estimated image;
selecting the next set of camera settings that maximizes an overall number of pixels having the set of desirable properties; and
replacing the initial set of camera settings with the next set of camera settings.
2. The method of claim 1 , further comprising:
acquiring a next image of the scene with the camera having the next set of camera settings.
3. The method of claim 2 , further comprising:
measuring, from the next image, a number of pixels in the next image having the set of desirable properties; and
selecting another next set of camera settings that maximizes a cumulative number of pixels having the set of desirable properties.
4. The method of claim 1 , in which the acquiring, measuring, estimating, selecting and replacing is repeated until the number of pixels having the set of desirable properties exceeds a threshold.
5. A camera configured to adaptively determine camera settings, comprising:
a set of camera settings;
a plurality of sensors elements configured to acquire an initial image of a scene according to an initial set of camera settings;
means for measuring, from the initial image, a number of pixels in the initial image having a set of desirable properties;
means for estimating, for each of a plurality of next sets of camera settings, a set of estimated properties for each pixel in an estimated image; and
means for selecting a next set of camera settings that maximizes an overall number of pixels having the set of desirable properties.
6. The method of claim 1 , in which the initial set of camera settings and the next set of camera settings includes a flash power setting and a shutter exposure time setting.
7. The method of claim 1 , in which the set of desirable properties includes an intensity over a threshold.
8. The method of claim 1 , in which the set of desirable properties includes a signal-to-noise ratio over a threshold.