Hi,
You can follow the below steps as a workaround to set the maximum displacement for the optical flow:
- Find the horizontal and vertical flow components for each pixel using the optical flow function.
- Calculate the magnitude of displacement for each pixel using the horizontal and vertical components. This gives you the speed at each pixel.
- For pixels where the displacement magnitude exceeds your threshold (e.g., 5 pixels), you can scale down the Vx and Vy components to meet your maximum displacement criterion.
Refer to the pseudo code below for a better understanding:
% Assuming 'opticFlow' is your computed optical flow object and 'I' is the current frame
flow = estimateFlow(opticFlow, I);
% Get the horizontal and vertical flow components
Vx = flow.Vx;
Vy = flow.Vy;
% Calculate the magnitude of displacement
displacementMagnitude = sqrt(Vx.^2 + Vy.^2);
% Define your maximum displacement threshold
maxDisplacement = 5;
% Find pixels where the displacement exceeds the maximum allowed
exceedsThreshold = displacementMagnitude > maxDisplacement;
% Scale down the Vx and Vy components for these pixels
Vx(exceedsThreshold) = Vx(exceedsThreshold) .* (maxDisplacement ./ displacementMagnitude(exceedsThreshold));
Vy(exceedsThreshold) = Vy(exceedsThreshold) .* (maxDisplacement ./ displacementMagnitude(exceedsThreshold));
% Now, Vx and Vy have been adjusted to ensure no displacement exceeds the maximum threshold
For more information on the "estimateFlow" function, refer to the below documentation:
