@inproceedings{Wen:2006:CSG,
  optpostscript = {},
  optorganization = {},
  author = {Fang Wen and Qing Luan and Lin Liang and Ying-Qing Xu and
            Heung-Yeung Shum},
  optkey = {},
  optannote = {},
  optseries = {},
  editor = {Doug DeCarlo and Lee Markosian},
  address = {New York},
  localfile = {papers/Wen.2006.CSG.pdf},
  optisbn = {},
  publisher = {ACM Press},
  optkeywords = {},
  doi = {http://doi.acm.org/10.1145/1124728.1124737},
  optmonth = {},
  optciteseer = {},
  opturl = {},
  optcrossref = {},
  optwww = {},
  booktitle = NPAR2006,
  optvolume = {},
  optnumber = {},
  abstract = {In this paper, we introduce an NPR system to generate color
              sketches in a free-hand drawing style. From observation, we found
              out that in a free-hand style both shape and color of image
              regions are stylized, which contributes cooperatively to the
              visual effect of a sketch. With the color regions obtained by our
              interactive segmentation algorithm, we create a stylized color
              sketch in two steps. First, in order to manifest the lighting and
              shading of each region, we shrink the boundary of the color
              regions with a luminance-based algorithm emphasizing the highlight
              parts, which enforces consistency with the free-hand artist style
              of the sketch. Second, the proposed color shift algorithm is
              applied to image regions to emphasize the main content of the
              sketch and acquires a visually pleasing combination of color. We
              choose the optimal combination by minimizing the energy function
              based on an artist drawn color database, artistic drawing rules
              and input image colors. The generated results show that our system
              can produce aesthetically pleasing sketches.},
  title = {{C}olor {S}ketch {G}eneration},
  year = {2006},
  pages = {47--54},
}