Video Pixel Density
Transforms a video flow into a grid of pixels density. It superimposes a grid and in each cell of the grid it counts the number of light pixels according the threshold. It also calculate the barycenter of the pixels density.
Can be used in motion detection, see /Library/Help Patches/Video/Pixel Density.pat example.
Settings
video in
Video input flow(s).
grid width
Number of rows of the grid.
grid height
Number of lines of the grid.
threshold
Pixels that have intensity (lightness) lower than the threshold are ignored.
grid density
Array containing the calculated density. Its length is grid width x grid height and can be connected to a matrix.
barycenter x
Barycenter of the pixels density on X axis (width)
barycenter y
Barycenter of the pixels density on Y axis (height)
autoscale
When ON, always maintains the output density array in the range [0..1].
See also
version 4.1.200704
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