Optical Flow
Fast optical flow computation using OF_DIS.
By Laurent Ittiitti@usc.eduhttp://jevois.orgGPL v3
Video Mapping: GREY 176 288 100 YUYV 176 144 100 JeVois OpticalFlow

Computes horizontal and vertical optical flow into two separate optical flow maps. This module is intended for uas as a pre-processor, that is, the images sent out may be further processed by the host computer.

The optical flow image output is twoce taller than the camera input image. On top is the horisontal motion map (darker shades for things moving rightward from the viewpoint of the camera, lighter for leftward, mid-grey level for no motion), and below it is the vertical motion map (dark for things moving down, bright for up).

ParameterTypeDescriptionDefaultValid Values
(FastOpticalFlow) opointintAlgorithm operating point1jevois::Range<int>(1, 4)
(FastOpticalFlow) factorfloatFactor to use when converting float velocities to byte25.0F-
(FastOpticalFlow) thetasfintFinest scale in the pyramid, or -1 for auto-1-
(FastOpticalFlow) thetaitintNumber of gradient descent iterations, or -1 for auto5-
(FastOpticalFlow) thetapsintPatch size in pixels, or -1 for auto-1-
(FastOpticalFlow) thetaovfloatPatch overlap on each scale, or -1 for auto0.1F-
(FastOpticalFlow) usevrefboolUse variational refinement when truefalse-
Detailed docs:OpticalFlow, FastOpticalFlow
Copyright:Copyright (C) 2016 by Laurent Itti, iLab and the University of Southern California
License:GPL v3
Support URL:http://jevois.org/doc
Other URL:http://iLab.usc.edu
Address:University of Southern California, HNB-07A, 3641 Watt Way, Los Angeles, CA 90089-2520, USA