PERFORMING SPATIAL & TEMPORAL IMAGE CONTRAST DETECTION IN PIXEL ARRAY

摘要

An imaging device has an array with pixels that can image an aspect of an object. In addition, pixels in the array can be used to perform motion detection or edge detection. A first and a second pixel can integrate light non-concurrently, and then their outputs may be compared. A difference in their outputs may indicate an edge in an imaging operation, and motion in a motion detection operation. The motion detection operation may be performed without needing the imaging device to have an additional modulated LED light source, and to spend the power to drive that source.

主权项

1. An imaging device, comprising:
a pixel array having pixels; and a controller configured to transmit to a group of the pixels control signals of a first type so as to cause the pixels in the group to concurrently image an aspect of an object, and of a second type so as to cause:
a first pixel in the group to integrate light from the object while a second pixel in the group does not, andthe second pixel to integrate light from the object while the first pixel does not; and a comparator configured to compare an output of the first pixel to an output of the second pixel so as to detect a motion of the pixel array with respect to the object.