windows-on-earth / winearth-webui

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All Issues Related to the Movies Here #28

Open DanielBarstow opened 2 weeks ago

DanielBarstow commented 2 weeks ago

In some movies, such as ISS020-E-30460-30578, it is not a movie but a selection of diverse images. Please remove it and any others like that. Thank you.

kevincoakley commented 2 weeks ago

We can look at removing the movies from the first batch manually, however, we cannot do it after this first batch. These are not just selection of diverse images but time-lapse movies where the period between frames is greater than 10 seconds. What should the cut off time be? 5 seconds between frames?

DanielBarstow commented 2 weeks ago

For a movie, astronauts fix-mount the camera in the window, and have it take pictures at a steady rate, such as 1 frame per second. When viewed in sequence, it gives the illusion of steady motion, flying over Earth, such as your movie ISS028-E-26411-26513.

Our "find a movie" algorithm should find those movies, but exclude a sequence of diverse images (taken with hand-held camera pointing at diverse locations at an inconsistent rate), such as your movie ISS020-E-30460-30578

Your algorithm should search for photos taken exactly the same time apart (let's use 1 photo per second) for at least 50 photos (that avoids a sequence of hand-held stills that might happen to be 1 per second) and continue until that precise rate ends.

What algorithm do you use now?

kevincoakley commented 2 weeks ago

Yes, I understand the problem. The issue is that ISS020-E-30460-30578 was captured in 15 second intervals. You can see the metadata from ISS020-E-30460-30578 below. The only solution is to limit the interval length and ignore movies with an interval greater than X. Should X be 5 seconds or 10 seconds?

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DanielBarstow commented 2 weeks ago

Can you set the time interval to exactly 1 fps? We won't get all movie sequences, but that is by far the most common.

Can you also ignore sequences with less than 50 photos? That is an arbitrary number, but avoids the situation in which by coincidence they did a sequence of hand-held images 1 sec apart.

DanielBarstow commented 1 week ago

Have you worked on this issue yet?

to avoid the "many diverse images" problem, you should search for movies with a time interval of exactly 1 fps, for at least 50 images.

thank you

kevincoakley commented 1 week ago

No, I haven't had time to look into this.

kevincoakley commented 3 days ago

@DanielBarstow,

When I change the time interval to exactly 1 fps then I only find about 300 movies total, that is down from 2600 when I didn't limit the time interval. Please let me know if you want me to continue and remove the existing 100 movies and add 100 new movies with the 1 fps time interval. I will likely not have time to create any additional new movies after this before the October deadline. I will use the latest 100 movies that were on the hard drive. Due to the time constraints at this point, I will likely not be able to add any "optical flow" to the real-time movies.

DanielBarstow commented 3 days ago

thanks Kevin. If you have time, yes, please find 100 recent movies at 1 fps. If you can do optical flow for, say, 10 of them that would help as proof of concept. but I understand time constraints. I appreciate all you've done.

kevincoakley commented 3 days ago

I will see if it is possible when I am back in the office next week.