CompAesth 15: Workshop on Computational Aesthetics

Permanent URI for this collection

Expressive 2015

Joint Symposium of
Computational Aesthetics (CAe)
Non-Photorealistic Animation and Rendering (NPAR)
Sketch-Based Interfaces and Modeling (SBIM)

Istanbul, Turkey | June 2015

Rendering and Modeling
Rendering Artistic Light Patterns
Li Ji, Amy Gooch, Lynda Gammon, and Brian Wyvill
Inverse Toon Shading: Interactive Normal Field Modeling with Isophotes
Qiuying Xu, Yotam Gingold, and Karan Singh
Adding Dynamics to Sketch-based Character Animations
Martin Guay, Rémi Ronfard, Michael Gleicher, and Marie-Paule Cani
Computational Models for the Analysis and Synthesis of Graffiti Tag Strokes
Daniel Berio and Frederic Fol Leymarie
Stylization
ShipShape: A Drawing Beautification Assistant
Jakub Fišer, Paul Asente, and Daniel Sýkora
Real-Time Activity Prediction: A Gaze-Based Approach for Early Recognition of Pen-Based Interaction Tasks
Çagla Çıg and Tevfik Metin Sezgin
Style-aware Robust Color Transfer
Hristina Hristova, Olivier Le Meur, Rémi Cozot, and Kadi Bouatouch
Hybrid-Space Localized Stylization Method for View-Dependent Lines Extracted from 3D Models
Luis Cardona and Suguru Saito
Recognition
Semi-Automatic Digital Epigraphy from Images with Normals
Sema Berkiten, Xinyi Fan, and Szymon Rusinkiewicz
Drawing Characteristics for Reproducing Traditional Hand-Made Stippling
Domingo Martín, Vicente del Sol, Celia Romo, and Tobias Isenberg
SVM-based Sketch Recognition: Which Hyperparameter Interval to Try?
Kemal Tugrul Yesilbek, Cansu Sen, Serike Cakmak, and T. Metin Sezgin
A Combined Junction-Cue Dictionary for Labelling Sketch Drawings with Artistic Shadows and Table-line Cues
Alexandra Bonnici and Kenneth P. Camilleri
Working with Images
Image Warping for a Painterly Effect
Jiayu Li and David Mould
Shake it up - Image Decomposition and Rearrangements of Its Constituents
Lena Gieseke, Sven Klingel, and Martin Fuchs
Image Stylization by Oil Paint Filtering using Color Palettes
Amir Semmo, Daniel Limberger, Jan Eric Kyprianidis, and Jürgen Döllner
Non-Photorealistic Rendering of Portraits
Paul L. Rosin and Yu-Kun Lai
Synthesis
Painting with Flowsnakes
Brian Wyvill
Texture-Aware ASCII Art Synthesis with Proportional Fonts
Xuemiao Xu, Linyuan Zhong, Minshan Xie, Jing Qin, Yilan Chen, Qiang Jin, Tien-Tsin Wong, and Guoqiang Han
Video Granular Synthesis
Angus Graeme Forbes and Javier Villegas
The Markov Pen: Online Synthesis of Free-Hand Drawing Styles
Katrin Lang and Marc Alexa

BibTeX (CompAesth 15: Workshop on Computational Aesthetics)
@inproceedings{
10.2312:exp.20151174,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Rendering Artistic Light Patterns}},
author = {
Ji, Li
and
Gooch, Amy
and
Gammon, Lynda
and
Wyvill, Brian
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151174}
}
@inproceedings{
10.2312:exp.20151177,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Computational Models for the Analysis and Synthesis of Graffiti Tag Strokes}},
author = {
Berio, Daniel
and
Leymarie, Frederic Fol
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151177}
}
@inproceedings{
10.2312:exp.20151180,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Style-aware Robust Color Transfer}},
author = {
Hristova, Hristina
and
Meur, Olivier Le
and
Cozot, Rémi
and
Bouatouch, Kadi
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151180}
}
@inproceedings{
10.2312:exp.20151186,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Image Warping for a Painterly Effect}},
author = {
Li, Jiayu
and
Mould, David
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151186}
}
@inproceedings{
10.2312:exp.20151187,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Shake it up - Image Decomposition and Rearrangements of Its Constituents}},
author = {
Gieseke, Lena
and
Klingel, Sven
and
Fuchs, Martin
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151187}
}
@inproceedings{
10.2312:exp.20151188,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Image Stylization by Oil Paint Filtering using Color Palettes}},
author = {
Semmo, Amir
and
Limberger, Daniel
and
Kyprianidis, Jan Eric
and
Döllner, Jürgen
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151188}
}
@inproceedings{
10.2312:exp.20151189,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Non-Photorealistic Rendering of Portraits}},
author = {
Rosin, Paul L.
and
Lai, Yu-Kun
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151189}
}
@inproceedings{
10.2312:exp.20151190,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Painting with Flowsnakes}},
author = {
Wyvill, Brian
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151190}
}
@inproceedings{
10.2312:exp.20151192,
booktitle = {
Computational Aesthetics},
editor = {
Paul L. Rosin
}, title = {{
Video Granular Synthesis}},
author = {
Forbes, Angus Graeme
and
Villegas, Javier
}, year = {
2015},
publisher = {
The Eurographics Association},
DOI = {
10.2312/exp.20151192}
}

Browse

Recent Submissions

Now showing 1 - 10 of 10
  • Item
    Frontmatter Expressive 2015
    (The Eurographics Association, 2015) Sezgin, Metin; Rosin, Paul L.; Mould, David; Benard, Pierre; Akleman, Ergun; Sezgin, Metin
  • Item
    Rendering Artistic Light Patterns
    (The Eurographics Association, 2015) Ji, Li; Gooch, Amy; Gammon, Lynda; Wyvill, Brian; Paul L. Rosin
    By combining knowledge from computer graphics and visual arts, we have built a projection installation based on a novel sketch-based shape pattern rendering method. Our novel rendering method is guided by an artist's drawing, and generates shape patterns resembling the input image, creating animation with an organic appearance. We have also applied the proposed method to render foliage shadow effects for virtual scenes. The major contribution of method is its ability to automatically render richly detailed, animated lighting patterns from an approximate lighting plan drawing. In our research team, professional artists and computer graphics researchers work together to develop our rendering method and the artistic rendering projects side by side. This interdisciplinary approach helps us to design and evolve our method for creating aesthetic work with computer graphics technologies.
  • Item
    Computational Models for the Analysis and Synthesis of Graffiti Tag Strokes
    (The Eurographics Association, 2015) Berio, Daniel; Leymarie, Frederic Fol; Paul L. Rosin
    In this paper we describe a system aimed at the generation and analysis of graffiti tags.We argue that the dynamics of the movement involved in generating tags is in large part - and at a higher degree with respect to many other visual art forms - determinant of their stylistic quality. To capture this notion computationally, we rely on a biophysically plausible model of handwriting gestures (the Sigma Lognormal Model proposed by Réjean Plamondon et al.) that permits the generation of curves which are aesthetically and kinetically similar to the ones made by a human hand when writing. We build upon this model and extend it in order to facilitate the interactive construction and manipulation of digital tags. We then describe a method that reconstructs any planar curve or a sequence of planar points with a set of corresponding model parameters. By doing so, we seek to recover plausible velocity and temporal information for a static trace. We present a number of applications of our system: (i) the interactive design of curves that closely resemble the ones typically observed in graffiti art; (ii) the stylisation and beautification of input point sequences via curves that evoke a smooth and rapidly executed movement; (iii) the generation of multiple instances of a synthetic tag from a single example. This last application is a step in the direction of our longer term plan of realising a system which is capable of automatically generating convincing images in the graffiti style space.
  • Item
    Style-aware Robust Color Transfer
    (The Eurographics Association, 2015) Hristova, Hristina; Meur, Olivier Le; Cozot, Rémi; Bouatouch, Kadi; Paul L. Rosin
    Transferring features, such as light and colors, between input and reference images is the main objective of color transfer methods. Current state-of-the-art methods focus mainly on the complete transfer of the light and color distributions. However, they do not successfully grasp specific light and color variations in image styles. In this paper, we propose a local method for carrying out a transfer of style between two images. Our method partitions both images to Gaussian distributed clusters by considering their main style features. These features are automatically determined by the classification step of our algorithm. Moreover, we present several novel policies for input/reference cluster mapping, which have not been tackled so far by previous methods. To complete the style transfer, for each pair of corresponding clusters, we apply a parametric color transfer method and a local chromatic adaptation transform. Results, subjective user evaluation as well as objective evaluation show that the proposed method obtains visually pleasing and artifact-free images, respecting the reference style.
  • Item
    Image Warping for a Painterly Effect
    (The Eurographics Association, 2015) Li, Jiayu; Mould, David; Paul L. Rosin
    We propose a two-stage approach to painterly rendering of photographs, where the image plane is first warped to produce a distorted or caricatured effect and then the resulting image is rendered with a painterly effect. We use SLIC superpixels to obtain an oversegmentation, and assign spring parameters uniformly to all pixels within a region; then, the mass-spring simulation distorts the plane in a random but content-sensitive way. With aggressive warping, the subsequent painterly rendering can be done lightly and need not remove much detail. The resulting renderings convey a sense of being painted and leave a sense of being handmade and not overly beholden to the photographic scene.
  • Item
    Shake it up - Image Decomposition and Rearrangements of Its Constituents
    (The Eurographics Association, 2015) Gieseke, Lena; Klingel, Sven; Fuchs, Martin; Paul L. Rosin
    Art aspires to surprise an observer and to offer a different perspective. Changing one's perspective enables a deeper understanding of the examined subject and gives insights that are invisible in the original. We propose a method to automatically deconstruct an image into visually coherent constituents and to rearrange those pieces in a surprising, aesthetically pleasing, and potentially informative fashion. Our pipeline is flexible and users can create their individual desired artistic expressions. We show with a survey that the visual appeal of the results vary in regard to the chosen parameter combinations. Lastly, we showcase a variety of examples that explore the design space and hope to show that a reconfiguration in itself presents a new piece of art.
  • Item
    Image Stylization by Oil Paint Filtering using Color Palettes
    (The Eurographics Association, 2015) Semmo, Amir; Limberger, Daniel; Kyprianidis, Jan Eric; Döllner, Jürgen; Paul L. Rosin
    This paper presents an approach for transforming images into an oil paint look. To this end, a color quantization scheme is proposed that performs feature-aware recolorization using the dominant colors of the input image. In addition, an approach for real-time computation of paint textures is presented that builds on the smoothed structure adapted to the main feature contours of the quantized image. Our stylization technique leads to homogeneous outputs in the color domain and enables creative control over the visual output, such as color adjustments and per-pixel parametrizations by means of interactive painting.
  • Item
    Non-Photorealistic Rendering of Portraits
    (The Eurographics Association, 2015) Rosin, Paul L.; Lai, Yu-Kun; Paul L. Rosin
    We describe an image-based non-photorealistic rendering pipeline for creating portraits in two styles: The first is a somewhat ''puppet'' like rendering, that treats the face like a relatively uniform smooth surface, with the geometry being emphasised by shading. The second style is inspired by the artist Julian Opie, in which the human face is reduced to its essentials, i.e. homogeneous skin, thick black lines, and facial features such as eyes and the nose represented in a cartoon manner. Our method is able to automatically generate these stylisations without requiring the input images to be tightly cropped, direct frontal view, and moreover perform abstraction while maintaining the distinctiveness of the portraits (i.e. they should remain recognisable).
  • Item
    Painting with Flowsnakes
    (The Eurographics Association, 2015) Wyvill, Brian; Paul L. Rosin
    Space filling curves, invented by mathematicians in the 19th century, have long been a fascination for artists, however there are no interactive tools to allow an artist to create and explore various levels of recursion of the curve in different parts of the artwork. In this work a new type of painting tool for artists is introduced, which gives the artist control over the very base of a space filling curve, i.e recursive subdivision. Although there are many such curves that would lend themselves to this treatment, the Flowsnake (Gosper) curve has been chosen in this work, mainly for its aesthetics. The curve is based on a hexagonal grid, and in our system hexagons are subdivided at the artist's touch in a non-homogeneous manner, leaving a trail that forms the space filling curve. Some tools are introduced for controlling the painting, such as limiting the depth of recursion, and the 'slow brush', which interpolates slowly between subdivisions to allow the artist to stop at a chosen level. A set of space filling curve brush types provide different shapes and profiles, for giving the artist control of the nonhomogeneous subdivision, including the ability to un-subdivide the hexagons. An algorithm for drawing the curve non-recursively is introduced in order to produce a polyline suitable for processing on the GPU to make the system function at interactive rates. An animated version of the image can be made by replaying the subdivisions from the first level. Some examples made by art students and graduates are shown, along with the artist's comments on the system.
  • Item
    Video Granular Synthesis
    (The Eurographics Association, 2015) Forbes, Angus Graeme; Villegas, Javier; Paul L. Rosin
    This paper introduces a technique that enables the creative reshaping of one or more video signals based on granular synthesis techniques, normally applied only to audio signals. We demonstrate that a wide range of novel video processing effects can be generated through conceptualizing a video signal as being composed of a large number of video grains. These grains can be manipulated and maneuvered in a variety of ways, and a new video signal can then be created through the resynthesis of these altered grains; effects include cloning, rotating, and resizing the video grains, as well as repositioning them in space and time. These effects have been used successfully in a series of interactive multimedia performances, leading us to believe that our approach has significant artistic potential.