@article{Martin:2001:RSV,
number = {4},
optnote = {},
author = {Domingo Mart{\'{\i}}n and Juan Carlos Torres},
optkey = {},
optannote = {},
keywords = {sillhouette extraction},
url = {http://www.eg.org/EG/CGF/Volume20/Issue4/CGF554.html},
localfile = {papers/Martin.2001.RSV.pdf},
journal = j-CGF,
doi = {http://dx.doi.org/10.1111/1467-8659.00554},
optmonth = {},
volume = {20},
optstatus = {doi},
title = {{R}endering {S}ilhouettes with {V}irtual {L}ights},
abstract = {We present a new method for obtaining non-photorealistic images.
These images have two main visual components: silhouettes and
non-realistic colouring. Silhouettes are lines that define the
form of an object. They are used in classical animation and
illustration as the main expressive components. In these
applications, if it is necessary, colouring can be added once the
drawings are made. For instance, generally, in illustration,
colouring is flat and does not transmit volume information whilst
silhouettes do it in an economical way. The proposed method is
based on the Virtual Lights model, which allows us to use external
components, the virtual lights, to define silhouettes. In this
way, the designer is free to control where, when and how the
silhouettes must appear. The method can be used with B-rep
geometric models.},
pages = {271--282},
year = {2001},
}
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