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0. Complete issue
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- 1. Rendering 3D graphics as an aid to stylized
line drawings in perspective
- Pages: 5-13
- Mark Arandjus, Helena Gabrijelčič Tomc
- Abstract | Download | View
Abstract
The aim of the research was to study the issue of drawing 2D objects
and environments in perspective and attempted to ease the process of
drawing them with the aid of three-dimensional computer graphics. The
goal of the research was to develop the method, which would exclude the
need to trace three-dimensional models, which many digital artists use
as a guide when making drawings. The need to trace has been eliminated
by finding a procedure to render three-dimensional models to appear
drawn – to appear drawn by an artist who has a stylized line style. After
researching various techniques of rendering, Sketchup was used to make
and apply a Sketchup style which emulated a line style. After that, various
tests were performed using computer measurements and questionnaires
to determine if the observers could distinguish between three-dimensional
renders and two-dimensional drawings. The results have shown
that very few participants notice three-dimensional graphics rendered
with Sketchup. Even among the few observers who did notice the presence
of three-dimensional models, none detected even half. The results
confirmed the adequateness of the methodology, which enables a more
correct creation of element in perspective and convinces the observers
that the entire image is stylistically uniform hand drawn image.
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2. Evaluation of the modified braille dots
printed with the UV ink-jet technique
- Pages: 15-24
- Raša Urbas, Bojan Rotar, Peter Hajdu, Urška Stankovič Elesini
- Abstract | Download | View
Abstract
Braille presents a complex system of writing with additional symbols and
letters designating numbers, capital letters and other special symbols in
mathematics, physics, music etc. Due to mentioned braille texts are usually
very long, bulky, space consuming and complex. In this research a study of
modified braille dots is presented. Samples were prepared in several different
steps, enabling the determination of the optimal braille dot height on top
which additional elements were printed. Properties of ordinary braille dot
samples and braille dot samples printed with additional element were compared
and analyzed. An extensive sensory analysis with blind and visually
impaired people was performed for establishing weather modified braille
dots can be tactile recognized and used in practice.
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3. A method for generating stochastic 3D tree
models with Python in Autodesk Maya
- Pages: 25-30
- Nemanja Stojanović
- Abstract | Download | View
Abstract
This paper introduces a method for generating 3D tree models using
stochastic L-systems with stochastic parameters and Perlin noise.
L-system is the most popular method for plant modeling and Perlin
noise is extensively used for generating high detailed textures. Our
approach is probabilistic. L-systems with a random choice of parameters
can represent observed objects quite well and they are used for
modeling and generating realistic plants. Textures and normal maps
are generated with combinations of Perlin noises what make these
trees completely unique. Script for generating these trees, textures and
normal maps is written with Python/PyMEL/NumPy in Autodesk Maya.
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- 4. The influence of printing substrate on macro
non-uniformity and line reproduction quality of
imprints printed with electrophotographic process
- Pages: 31-37
- Đorđe Vujčić, Branka Ružičić
- Abstract | Download | View
Abstract
Print quality is very important for every printing technique. It depends on
many different quality attributes. This research included analysis of macro
non-uniformities and line reproduction. 16 different paper substrates printed
by electrophotographic process were analyzed. They were separated in two
groups: coated and uncoated papers. Analysis of macro non-uniformity
showed that print mottle has lower values when printed on coated papers
than on uncoated papers. Line reproduction analysis showed that the toner
spreaded, during melting and fixation, on line edges for both types of paper.
According to these results it can be concluded that paper substrate affects
the macro non-uniformity and line reproduction, thus overall print quality.
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