Multiple Exposure video editing

I was thinking about making a Time Lapse, hyperlapse, and/or slow motion video so that each frame can be a multiple exposure. Whether it be HDR, Focus stacked frames, or double exposure, or a combination of more than one of the techniques, it seems like it might be a very tedious task but could be quite rewarding. What does everyone think? Presumably, the main reason I might be finding it so difficult is because I've never used much of any advanced video-editing software. I've used Photoshop extensively though. but maybe with some video-editing software, it might be much simpler? Is photoshop adequate to do something like this, or would it be much better to combine some other specific software to aid in making the editing process more efficient? Lastly, has anyone here tried say, a focus stacked time lapse, or double exposure slow motion video?

MacM545 wrote:

I was thinking about making a Time Lapse, hyperlapse, and/or slow motion video so that each frame can be a multiple exposure. Whether it be HDR, Focus stacked frames, or double exposure, or a combination of more than one of the techniques, it seems like it might be a very tedious task but could be quite rewarding. What does everyone think?

In my Time Domain Continuous Imaging (TDCI) research, you can synthesize virtual exposures spanning any time intervals desired. For example, you could keep the framerate the same but request a virtual shutter angle of greater than 360 degrees. The tool that does this from video frames is called TIK, as described in TIK: a time domain continuous imaging testbed using conventional still images and video . It's still not an entirely easy tool to use, but the structure is described at http://aggregate.org/DIT/TIK/ and there are some sample command lines and a link to the latest, 20220707 C++/OpenCV source code, version near the bottom of the page.

Paul Eberhart, my PhD student, is completing his thesis on allowing time to be treated as a complete dimension, so you could specify arbitrary, spatially variable, temporal integration functions -- including ones that have some negative weightings. In case you're wondering, negative weights basically allow differencing one temporal interval from another so you just see the portion of the scene that changed.

Presumably, the main reason I might be finding it so difficult is because I've never used much of any advanced video-editing software. I've used Photoshop extensively though. but maybe with some video-editing software, it might be much simpler? Is photoshop adequate to do something like this, or would it be much better to combine some other specific software to aid in making the editing process more efficient? Lastly, has anyone here tried say, a focus stacked time lapse, or double exposure slow motion video?

All those are subsets of what TDCI can do. Photoshop is strictly frame oriented, whereas TIK TDCI basically converts a series of frames into a smooth waveform describing how each pixel value varies over time and then renders frames by integrating the curve for each pixel over each desired output frame time interval.

Sounds interesting. I may take a look at the program, it's certainly piqued my curiosity!