Video slicing a variant of slit scanning in photography extracts
a scan line from a video frame and successively adds that line to a composite
image over time. The composite image becomes a time line, where its visual
patterns reflect changes in a particular area of the video stream. We extend
this idea of video slicing by allowing users to draw marks anywhere on the
source video to capture areas of interest. These marks, which we call
slittears, are used in place of a scan line, and the resulting composite
timeline image provides a much richer visualization of the video data.
Depending on how tears are placed, they can accentuate motion, small changes,
directional movement, and relational patterns.
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