Visual Computing

University of Konstanz
Proceedings of the 4th International Symposium on Non-photorealistic Animation and Rendering

Real-time Pen-and-ink Illustration of Landscapes

L. Coconu, O. Deussen, H. Hege
Teaser of Real-time Pen-and-ink Illustration of Landscapes


Paper (.pdf, 785.5KB)


Non-photorealistic rendering has been proven to be particularly efficient in conveying and transmitting selected visual information. Our paper presents a NPR rendering pipeline that supports pen-andink illustration for, but not limited to, complex landscape scenes in real time. This encompasses a simplification framework using clustering which enables new approaches to efficient and coherent rendering of stylized silhouettes, hatching and abstract shading. Silhouette stylization is performed in image-space. This avoids explicit computation of connected lines. Further, coherent hatching of the tree foliage is performed using an approximate view-dependent parameterization computed on-the-fly within the same simplification framework. All NPR algorithms are integrated with photorealistic rendering, allowing seamless transition and combination between a variety of photorealistic and non-photorealistic drawing styles.


  acmid     = {1124734},
  address   = {New York, NY, USA},
  author    = {L. Coconu, O. Deussen, H. Hege},
  booktitle = {Proceedings of the 4th International Symposium on Non-photorealistic Animation and Rendering},
  doi       = {10.1145/1124728.1124734},
  isbn      = {1-59593-357-3},
  keywords  = {complex plant scenes, level-of-detail, line art, non-photorealistic rendering, outdoor scenes, real-time hatching},
  location  = {Annecy, France},
  numpages  = {9},
  pages     = {27--35},
  publisher = {ACM},
  series    = {NPAR '06},
  title     = {Real-time Pen-and-ink Illustration of Landscapes},
  url       = {},
  year      = {2006}