Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The Most Efficient Vector Graphics Compression Technique in the World Invented at the University of Joensuu

17.10.2003


The digital world surrounding us is full of images. Many of them are very large and do not easily fit into small devices, such as smart mobile phones. Alexander Kolesnikov’s thesis brings a revolutionary change to this. He has invented the most efficient vector graphics compression technique in the world that will make all maps, drawings and cartoons fit into small but smart mobile phones.



Digital images on digital TV’s, DVDs and computer and mobile device displays come in two variants: raster images and vector images. Digital photographs are raster images and can be simply compressed to small devices. Not so maps, drawings and technical layouts that are vector images. It is often precisely these images that are needed in professional applications of mobile devices. From now on this will change in a dramatic way.

The thesis of Alexander Kolesnikov “Efficient algorithms for vectorization and polygonal approximation” is dedicated to the problem of optimal approximation of piecewise linear curves. How the curves can be represented with less error for a given number of approximation linear segments? This is classical problem in computational geometry, computer graphics and data compression. With heuristic algorithms a result can be obtained fast, but the result is non-optimal. With optimal algorithms we can achieve a perfect result, but the algorithms are too slow to be used in practice.
Can we achieve a perfect or almost perfect result in a reasonable time? In other words, can we borrow a good time performance from heuristic methods and the high quality of the solution from the optimal algorithm?



To solve the problem Alexander Kolesnikov has developed an iterative reduced search algorithm. It drastically reduces processing time by a factor from one hundred up to one thousand. The trade-off between processing time and solution quality can be controlled by parameters of the algorithm and the number of iterations.

The developed algorithms can be used in geographic information systems (GIS), digital cartography, image processing, and pattern recognition for vector map simplification, digitized curves approximation, vector data compression and reduction.

Pasi Ripatti | alfa
Further information:
http://www.joensuu.fi

More articles from Information Technology:

nachricht Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale
18.01.2017 | The Hebrew University of Jerusalem

nachricht Data analysis optimizes cyber-physical systems in telecommunications and building automation
18.01.2017 | Fraunhofer-Institut für Algorithmen und Wissenschaftliches Rechnen SCAI

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

A big nano boost for solar cells

18.01.2017 | Power and Electrical Engineering

Glass's off-kilter harmonies

18.01.2017 | Materials Sciences

Toward a 'smart' patch that automatically delivers insulin when needed

18.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>