Non-photorealistic Rendering with Reduced Colour Palettes

Chapter
Part of the Computational Imaging and Vision book series (CIVI, volume 42)

Abstract

In contrast to photorealistic rendering, where richer colours are likely to be preferred, non-photorealistic rendering can often benefit from some abstraction, and colour palette reduction is one direction. By using a small number of carefully selected colours the overall tonal distribution can be well expressed with less visual clutter. This is also essential to simulate certain art forms, such as cartoons, comics, paper-cuts, woodblock printing, etc. that naturally prefer or require reduced palettes. In this chapter we will summarise major techniques used in colour palette reduction, such as region segmentation, thresholding and colour palette selection. Most approaches consider images as input and generate stylised image renderings while some work also considers video stylisation, in which case temporal coherence is essential. We finish this chapter with some discussions of potential future directions.

Keywords

Iterative Graph Coherence Hull Charcoal Convolution 

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Copyright information

© Springer-Verlag London 2013

Authors and Affiliations

  1. 1.School of Computer Science and InformaticsCardiff UniversityCardiffUK

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