Use of non-photorealistic rendering and photometric stereo in making bas-reliefs from photographs

J. Wu, R. R. Martin, P. L. Rosin, X. F. Sun, Y. K. Lai, Y. H. Liu, C. Wallraven

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Automatic bas-relief generation from 2D photographs potentially has applications to coinage, commemorative medals and souvenirs. However, current methods are not yet ready for real use in industry due to insufficient artistic effect, noticeable distortion, and unbalanced contrast. We previously proposed a shape-from-shading (SFS) based method to automatically generate bas-reliefs from single frontal photographs of human faces; however, suppression of unwanted details remained a problem. Here, we give experimental results showing how incorporating non-photorealistic rendering (NPR) into our previous framework enables us to both suppress unwanted detail, and yet also emphasize important features. We have consider an alternative approach to recovering relief shape, based on photometric stereo instead of SFS for surface orientation estimation. This can effectively reduce the computational time.

Original languageEnglish
Pages (from-to)202-213
Number of pages12
JournalGraphical Models
Volume76
Issue number4
DOIs
Publication statusPublished - 2014 Jul

Keywords

  • Bas-relief
  • Non-photorealistic rendering
  • Photometric stereo
  • Shape-from-shading

ASJC Scopus subject areas

  • Software
  • Modelling and Simulation
  • Geometry and Topology
  • Computer Graphics and Computer-Aided Design

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