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2017-08-07 13:37:59 -0500 commented question Determining the pattern orientation of a spatiotemporal image

@sturkmen, I've added original image

2017-08-07 09:33:32 -0500 received badge  Editor (source)
2017-08-07 07:57:09 -0500 asked a question Determining the pattern orientation of a spatiotemporal image

How can I obtain average direction of the pattern shown in the figure below. It is the direction of the red arrow relative to the yellow (horizontal) line. Any ideas for an approach? I couldn't figure out a way to approach. This is a spatio-temporal image created from a video. Thank you.

image description

Original image is below: image description

Another sample image: image description