Autofocus for stereo images

摘要

Present embodiments contemplate systems, apparatus, and methods to determine an appropriate focal depth for a sensor based upon a pair of stereoscopic images. Particularly, certain of the embodiments contemplate determining keypoints for each image, identifying correlations between the keypoints, and deriving object distances from the correlations. These distances may then be used to select a proper focal depth for one or more sensors.

主权项

1. A method in an electronic device for determining a focal depth for an image sensor, comprising:
receiving a first image in the visible spectrum, the first image associated with a first viewpoint; receiving a second image in the visible spectrum, the second image associated with a second viewpoint; determining a first plurality of keypoints based on the first image; correlating keypoints from the first plurality of keypoints with positions in the second image; determining a plurality of disparities associated with each of the first plurality of keypoints to form a sparse depth map; and determining a focal depth for capturing a third image in the visible spectrum based upon the sparse depth map, the position of the first viewpoint and the position of the second viewpoint.