A new QEM for parametrization of raster images

Xuetao Yin, John Femiani, Peter Wonka, Anshuman Razdan

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We present an image processing method that converts a raster image to a simplical two-complex which has only a small number of vertices (base mesh) plus a parametrization that maps each pixel in the original image to a combination of the barycentric coordinates of the triangle it is finally mapped into. Such a conversion of a raster image into a base mesh plus parametrization can be useful for many applications such as segmentation, image retargeting, multi-resolution editing with arbitrary topologies, edge preserving smoothing, compression, etc. The goal of the algorithm is to produce a base mesh such that it has a small colour distortion as well as high shape fairness, and a parametrization that is globally continuous visually and numerically. Inspired by multi-resolution adaptive parametrization of surfaces and quadric error metric, the algorithm converts pixels in the image to a dense triangle mesh and performs error-bounded simplification jointly considering geometry and colour. The eliminated vertices are projected to an existing face. The implementation is iterative and stops when it reaches a prescribed error threshold. The algorithm is feature-sensitive, i.e. salient feature edges in the images are preserved where possible and it takes colour into account thereby producing a better quality triangulation.

Original languageEnglish (US)
Pages (from-to)2440-2451
Number of pages12
JournalComputer Graphics Forum
Volume30
Issue number8
DOIs
StatePublished - Dec 2011

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Keywords

  • Decimation
  • Image parametrization
  • Image vectorization
  • Quadric error metrics

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design

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