Open BBBBBBob opened 2 years ago
@BBBBBBob optical flow is not intended for visualization. Please try with OpticalFlowViz (which corresponds to ImageType 9 instead of 8 )
@BBBBBBob optical flow is not intended for visualization. Please try with OpticalFlowViz (which corresponds to ImageType 9 instead of 8 )
@jonyMarino Hi, thanks for your reply! Indeed, I would like to retrieve the optical flow velocity from the image, so what is the right way to get the velocity information?
Hi @BBBBBBob, were you able to find a solution to get the optical flow from AirSim?
Hi @BBBBBBob, were you able to find a solution to get the optical flow from AirSim?
Sorry for the late reply, we have not found a feasible solution and turned to calculate the optical flow between two frames.
@BBBBBBob optical flow is not intended for visualization. Please try with OpticalFlowViz (which corresponds to ImageType 9 instead of 8 )
Though it is not meant for visualizing, but mind explaining about how to read optical flow from an png file ( a file that only has positive values from 0 to 255). I know that there is an option of using pfm files, but the pfm files it gave me only have one channel and I have no idea if it is vx or vy.
Thanks!
Bug report
What's the issue you encountered?
In the OpticalFlow setting, the optical flow cannot be returned when the camera moves in a certain direction. Here is a video example https://www.youtube.com/watch?v=HT5wWK1M5AI: The problem could be that the velocity is mapped between the -1 and 1, but the Unreal Engine Material only returns the black color when the velocity is non-positive, even though
AllowNegativeEmissiveColor
is enabled.Settings
How can the issue be reproduced?
Include full error message in text form
What's better than filing an issue? Filing a pull request :).