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File:Signed distance field duck.svg

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Original file (SVG file, nominally 500 × 500 pixels, file size: 124 KB)

Summary

Description
English: This is an image visualizing a discrete 2D signed distance field (SDF). The original represented shape (duck) is in grey. Crosses mark pixel centers where SDF values are stored. From each pixel center a circles expands that visualizes the value stored at the pixel. The radius represents magnitude, the color represents a sign (red is negative, inside the shape; green is positive, outside the shape). Unification of green areas define the set of points that are definitely outside the shape, the unification of red ones define the set of points that are definitely inside. We can see that although the SDF representation may be better than classical raster image at this resolution, with a limited number of pixels in the raster the image is still represented imperfectly, with areas that are neither green nor red, defining a set of points whose belonging to the shape is unknown and for which a separate algorithm has to be used to estimate this. The picture also shows how more pixels further away from the shape improve accuracy of the representation.
Date
Source Own work
Author Drummyfish

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I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

Captions

visualization of signed distance field

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depicts

29 June 2020

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Date/TimeThumbnailDimensionsUserComment
current18:24, 29 June 2020Thumbnail for version as of 18:24, 29 June 2020500 × 500 (124 KB)DrummyfishUploaded own work with UploadWizard

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