[英]How to obtain velocity and magnitude vectors of the optical flow field? I am using Lucas-Kande method of optical flow
我正在处理以下代码。
n=0;
folder = fileparts(which('viptraffic.avi'));
movieFullFileName = fullfile(folder, 'viptraffic.avi');
vidReader = VideoReader(movieFullFileName);
opticFlow = opticalFlowLK('NoiseThreshold',0.0039);
while hasFrame(vidReader)
frameRGB = readFrame(vidReader);
frameGray = rgb2gray(frameRGB);
flow = estimateFlow(opticFlow,frameGray);
H=imag(flow)
V=real(flow)
frameWithFlow = getframe(gca);
imshow(frameRGB);
imshow(frameWithFlow.cdata)
hold on
plot(flow,'DecimationFactor',[5 5], 'ScaleFactor',10)
hold off
n=n+1;
end
有没有办法获得每个图像中获得的每个光流场的速度和幅度的光流估计?
estimateFlow
返回一个opticalFlow对象,该对象具有幅度,相位和速度的属性。 所以,在你的情况下, flow
是一个opticalFlow
flow
对象,而不是一个复杂的数组,你不能将它传递给real
和imag
。 相反,使用对象的属性:
flow.Vx % x component of velocity
flow.Vy % y component of velocity
flow.Orientation % Phase
flow.Magnitude % Magnitude
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