GVU Technical Report Number:
GIT-GVU-93-04
Title:
High Quality Image Warp Filters on Pyramids
Authors:
Jack Tumblin
Brian Guenter
Abstract:
Directional filters applied to prefiltered imput image pyramids strike a
good balance between fast computation and sharp, alias-free images, and
are widely used for texture mapping and image warping. However, most
published methods use implicit conversions between discrete and
continuous images. This causes two flaws: 1) an input reconstruction
filter is missing, causing unpredictable warp-dependent distortions and
aliasing artifacts, and 2) address calculations are needlessly complex
and inflexible. By including this filter we find a simpler, more
accurate, and more general implementation of filtering for texture maps
and image warping that can use any desired filter kernel. Effects of
cascaded filters in image pyramids are also briefly discussed.
Keywords:
Image warping, image pyramids, texture mapping, filtering
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