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open-mmlab / mmaction2

OpenMMLab's Next Generation Video Understanding Toolbox and Benchmark
https://mmaction2.readthedocs.io
Apache License 2.0
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How to correctly read the jpg images of optical flow for JHMDB/UCF101-24? #1933

Closed r09921135 closed 2 years ago

r09921135 commented 2 years ago

The optical flow these two datasets provide is jpg image. But, I want to use a flow stream ResNeXt-101 pre-trained weights from here, where the input shape of flow needs to be 2-channel. Besides, I assume the 2-channel optical flow is more of a standard format? So, my question is how to convert a jpg image of optical flow into a 2-channel one or what's the correct way to read such optical flow images? Thank you!!

hukkai commented 2 years ago

@r09921135 The data is provided from https://github.com/MCG-NJU/MOC-Detector/blob/master/readme/Dataset.md. Maybe you can ask them, since I do not have the optical flow data at hand. I guess one optical flow is stored in two gray images, namely x.jpeg and y.jpeg.

hukkai commented 2 years ago

Closed since no response for a long time. If you need further discussion, feel free to re-open the issue. Thanks!