Yu Lan Liu

US Patent:

20190215518, Jul 11, 2019

Filed:

Jan 10, 2018

Appl. No.:

15/866582

Inventors:

- San Diego CA, US
Marc Bosch Ruiz - Rockville MD, US
Yu Liu - Menlo Park CA, US
Shyamprasad Chikkerur - San Diego CA, US
Yunqing Chen - Los Altos CA, US
Tushar Singhal - San Diego CA, US
Shu Lin - San Diego CA, US
Kai Wang - San Diego CA, US
Harikrishna Reddy - San Jose CA, US

International Classification:

H04N 19/139
G06T 7/269
H04N 19/53
G06T 7/207

Abstract:

Methods, systems, and devices for motion analysis are described. Generally, the described techniques provide for computationally efficient and accurate motion analysis. A device may identify frames of a video frame sequence having a defined resolution. The device may downscale the frames to generate a plurality of downsampled images each having a resolution lower than the defined resolution. The device may generate a respective histogram vector for each pixel of each downsampled image and each pixel of the original frames. The device may determine a motion vector candidate based at least in part on the histogram vectors. The device may apply a filter to the motion vector candidates to determine a final motion vector and output an indication of motion between the frames of the video frame sequence based at least in part on the final motion vector for each pixel of the second frame.