US 11,688,078 B2 · Video object detection

Abstract

A method for video object detection includes detecting an object in a first video frame, and selecting a first interest point and a second interest point of the object. The first interest point is in a first region of interest located at a first corner of a box surrounding the object. The second interest point is in a second region of interest located at a second corner of the box. The second corner is diagonally opposite the first corner. A first optical flow of the first interest point and a second optical flow of the second interest point are determined. A location of the object in a second video frame is estimated by determining, in the second video frame, a location of the first interest point based on the first optical flow and a location of the second interest point based on the second optical flow.

Claims20

Dependent claims

A video processor, comprising:

an object detection circuit configured to detect an object in a first video frame;
and
an object propagation circuit configured to:
select a first interest point of the object in the first video frame from a first plurality of interest points based on a first optical flow associated with the first interest point;
select a second interest point of the object in the first video frame from a second plurality of interest points based on a second optical flow associated with the second interest point;
and
estimate a location of the object in a second video frame by determining a location of the first interest point in the second video frame based on the first optical flow and determining a location of the second interest point in the second video frame based on the second optical flow.

4 more elements

A video system, comprising:

a camera configured to capture images of an operating environment;
a video processor coupled to the camera, the video processor configured to:
receive a first video frame and a second video frame from the camera;
detect an object in the first video frame;
define a perimeter that surrounds the object;
define a first region of interest in the perimeter;
select a first interest point among a first plurality of interest points in the first region based on a first optical flow associated with the first interest point;
define a second region of interest in the perimeter;
select a second interest point among a second plurality of interest points in the second region based on a second optical flow associated with the second interest point;
and
estimate a location of the object in the second video frame by determining a location of the first interest point in the second video frame based on the first optical flow and determining a location of the second interest point in the second video frame based on the second optical flow.

8 more elements

Dependencies are inferred from the claim text.

Video object detection

Life of this patent

Video object detection

Life of this patent

Abstract

Claims20