3,837 research outputs found
Non-Photorealistic Rendering
Cílem této diplomové práce je prozkoumat možnosti nefotorealistického zobrazování, zaměřit se na oblast transformace obrazu a následně navrhnout algoritmus pro zpracování videa na jeho "cartoon" reprezentaci. Práce popisuje analýzu problému, návrh algoritmu a jeho implementaci.The purpose of this diploma thesis is to analyze possibilities of non-photorealistic rendering focused on area of image transformation and afterwards design algorithm for video postprocessing to it's cartoon representation. The thesis describes problem analysis, design of the algorithm and it's implementation.
CLD-shaped Brushstrokes in Non-Photorealistic Rendering
Rendering techniques based on a random grid can be improved by adapting
brushstrokes to the shape of different areas of the original picture. In this
paper, the concept of Coherence Length Diagram is applied to determine the
adaptive brushstrokes, in order to simulate an impressionist painting. Some
examples are provided to instance the proposed algorithm.Comment: Keywords: Image processing, Non-photorealistic processing,
Image-based rendering Coherence Length Diagra
Non-photorealistic image rendering with a labyrinthine tiling
The paper describes a new image processing for a non-photorealistic
rendering. The algorithm is based on a random generation of gray tones and
competing statistical requirements. The gray tone value of each pixel in the
starting image is replaced selecting among randomly generated tone values,
according to the statistics of nearest-neighbor and next-nearest-neighbor
pixels. Two competing conditions for replacing the tone values - one position
on the local mean value the other on the local variance - produce a peculiar
pattern on the image. This pattern has a labyrinthine tiling aspect. For
certain subjects, the pattern enhances the look of the image.Comment: 9 pages, 5 figure
Image Sampling with Quasicrystals
We investigate the use of quasicrystals in image sampling. Quasicrystals
produce space-filling, non-periodic point sets that are uniformly discrete and
relatively dense, thereby ensuring the sample sites are evenly spread out
throughout the sampled image. Their self-similar structure can be attractive
for creating sampling patterns endowed with a decorative symmetry. We present a
brief general overview of the algebraic theory of cut-and-project quasicrystals
based on the geometry of the golden ratio. To assess the practical utility of
quasicrystal sampling, we evaluate the visual effects of a variety of
non-adaptive image sampling strategies on photorealistic image reconstruction
and non-photorealistic image rendering used in multiresolution image
representations. For computer visualization of point sets used in image
sampling, we introduce a mosaic rendering technique.Comment: For a full resolution version of this paper, along with supplementary
materials, please visit at
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