Motiongram of vertical motion (time from left to right)

Difference between videogram and motiongram

For some upcoming blog posts on videograms, I will start by explaining the difference between a motiongram and a videogram. Both are temporal (image) representations of video content (as explained here), and are produced almost in the same way. The difference is that videograms start with the regular video image, and motiongrams start with a motion image.

So for a video of my hand like this:

we will get this horizontal videogram:

Videogram of hi-speed hand motion

and this horizontal motiongram:

Motiongram of hi-speed hand motion

As you see, they both reflect the video content. The main difference is that the videogram preserves the original background colours, while the motiongram only reflects what changes between the frames (i.e. the motion).

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Alexander Refsum Jensenius is a music researcher and research musician living in Oslo, Norway.

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