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

Authors
Wu, J.Martin, R. R.Rosin, P. L.Sun, X. -F.Lai, Y. -K.Liu, Y. -H.Wallraven, C.
Issue Date
2014
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Keywords
Bas-relief; Non-photorealistic rendering; Shape-from-shading; Photometric stereo
Citation
GRAPHICAL MODELS, v.76, pp.202 - 213
Indexed
SCIE
SCOPUS
Journal Title
GRAPHICAL MODELS
Volume
76
Start Page
202
End Page
213
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101186
DOI
10.1016/j.gmod.2014.02.002
ISSN
1524-0703
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. (C) 2014 Elsevier Inc. All rights reserved.
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