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Sketchist
The underlying idea of Sketchist is
based on the concept of human painting. Sketchist creates it’s effect by
applying thousands of curved brushstrokes that each follow the contours of
the source image. This mimics the way
humans see objects, and the results are
simply stunning.
We must note that Sketchist is a rather
slow effect because it’s doing a tremendous amount of work. It’s applying
tens of thousands of individual brushstrokes over the image. This takes time
to process. So, we will give you a few
tips on getting faster previews so you
can get the exact effect you want with
the least trouble.
Sketchist generates a placement grid
based on the perceptual differences
in the image structure. Sketchist uses
a human vision perceptual model to
define where the brush strokes will
be placed. You can control the overall density of the grid, the perceptual
threshold and the total number of
strokes applied to the grid.
It then begins to render each brush,
following the contours of the image
(the “path of the stroke”) until it finds
a pixel in the source image that is too
far out of color range from the point
where the stroke was first started. You
can control the maximum number of
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