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Orientable Textures for Image-Based Pen-and-Ink Illustration
Abstract
We present an interactive system for creating pen-and-ink-style line
drawings from greyscale images in which the strokes of the rendered
illustration follow the features of the original image. The user,
via new interaction techniques for editing a direction field, specifies
an orientation for each region of the image; the computer draws oriented
strokes, based on a user-specified set of example strokes, that
achieve the same tone as the image via a new algorithm that compares
an adaptively-blurred version of the current illustration to the
target tone image. By aligning the direction field with surface orientations
of the objects in the image, the user can create textures that
appear attached to those objects instead of merely conveying their
darkness. The result is a more compelling pen-and-ink illustration
than was previously possible from 2D reference imagery.
Bibtex
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