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Department: Any ÅAU / Department of Information Technologies UTU / Department of Information Technology UTU / Department of Mathematics and Statistics UTU / Turku School of Economics, Institute of Information Systems Sciences

Research Unit: Any Algorithmics and Computational Intelligence Group (ACI) Biomathematics Research Unit (BIOMATH) Communication Systems (ComSys) Computational Biomodeling Laboratory (Combio Lab) Data Mining and Knowledge Management Laboratory Distributed Systems Laboratory (DS Lab) Embedded Computer and Electronic Systems (ECES) Embedded Systems Laboratory (ESLAB) FUNDIM, Fundamentals of Computing and Discrete Mathematics Institute for Advanced Management Systems Research (IAMSR) Learning and Reasoning Lab Software Construction Laboratorium Software Development Laboratory (SwDev) Software Engineering Laboratory (SE Lab) Turku BioNLP Group Turku Optimization Group (TOpGroup) UTU Information Systems Science (ISS)

Publication type: Any Monographs Edited books Edited special issues of journals Edited proceedings Articles in journals Articles in proceedings Chapters in edited books Ph.D. thesis Lic. thesis Technical reports

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Articles in journals (16):

• Juha Kivijärvi, Pasi Fränti, Olli Nevalainen, Self-Adaptive Genetic Algorithm for Clustering. Journal of Heuristics 9(2), 113–129, 2003.
• Olli Virmajoki, Pasi Fränti, Timo Kaukoranta, Practical methods for speeding-up the PNN method. Optical Engineering 40(11), 2495–2504, 2001.
• Pasi Fränti, Helge Gyllenberg, Mats Gyllenberg, Juha Kivijärvi, Timo Koski, Tatu Lund, Olli Nevalainen, Minimizing stochastic complexity using local search and GLA with applications to classification of bacteria. BioSystems 57(1), 37 – 48, 2000.
• Pasi Fränti, Timo Kaukoranta, Day-Fann Shen, Kuo-Shu Chang, Fast and memory efficient implementation of the exact PNN. IEEE Transactions on Image Processing 9(5), 773–777, 2000.
• Pasi Fränti, Juha Kivijärvi, Randomised Local Search Algorithm for the Clustering Problem. Pattern Analysis & Applications 3(4), 358-369, 2000.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, A fast exact GLA based on code vector activity detection. IEEE Transactions on Image Processing 9(8), 1337–1342, 2000.
• Pasi Fränti, Timo Kaukoranta, Binary vector quantizer design using soft centroids. Signal Processing: Image Communication 14(9), 677–681, 1999.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Vector quantization by lazy pairwise nearest neighbour method. Optical Engineering 38(11), 1862–1868, 1999.
• Pasi Fränti, Juha Kivijärvi, Olli Nevalainen, Tabu search algorithm for codebook generation in vector quantization. Pattern Recognition 31(8), 1139–1148, 1998.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Iterative split-and-merge algorithm for VQ codebook generation. Optical Engineering 37(10), 2726–2732, 1998.
• Pasi Fränti, Juha Kivijärvi, Timo Kaukoranta, Olli Nevalainen, Genetic algorithms for large-scale clustering problems. The Computer Journal 40(9), 547-554, 1997.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, On the Design of a Hierarchical BTC-VQ Compression System. Signal Processing: Image Communication 8(6), 551–562, 1996.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Reallocation of GLA codevectors for evading local minima. Electronics Letters 32(17), 1563–1564, 1996.
• Pasi Fränti, Olli Nevalainen, Compression of binary images by composite methods based on block coding. J of Visual Communication and Image Representation 6(4), 366--377, 1995.
• Pasi Fränti, Olli Nevalainen, Block truncation coding with entropy coding. IEEE Trans on Communications 43(2), 1677--1685, 1995.
• Pasi Fränti, Olli Nevalainen, Timo Kaukoranta, Compression of Digital Images by Block Truncation Coding: A Survey. The Computer Journal 37(4), 308--332, 1994.

Articles in proceedings (12):

• Olli Virmajoki, Pasi Fränti, Timo Kaukoranta, Fast PNN Using Partial Distortion Search. In: Proceedings of International Conference on Computer Analysis of Images and Patterns CAIP'2001, 77-84, 2001.
• Olli Virmajoki, Pasi Fränti, Timo Kaukoranta, Fast PNN Using Mean-Distance Ordered Search. In: Proceedings of International Conference on Information, Communications & Signal Processing (ICICS 2001), 2001.
• Juha Kivijärvi, Pasi Fränti, Olli Nevalainen, Efficient clustering with a self-adaptive genetic algorithm. In: Proc. World Multiconference on Systemics, Cybernetics and Informatics (SCI2000), vol. III, 241-246, 2000.
• Pasi Fränti, Juha Kivijärvi, Random swapping technique for improving clustering in unsupervised classification. In: Proc. 11th Scandinavian Conf. on Image Analysis, 407-413, 1999.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Reduced comparison search for the exact GLA. In: Proc. Data Compression Conference - DCC'99, 33-41, 1999.
• Pasi Fränti, Timo Kaukoranta, Fast implementation of the optimal PNN method. In: Proc. International Conference on Image Processing, 1998.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Fast and space efficient PNN algorithm with delayed distance calculations. In: Proc. GraphiCon'98: The 8-th International Conference on Computer Graphics and Visualization, 219-224, 1998.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, A new iterative algorithm for VQ codebook generation. In: Proc. International Conference on Image Processing, 1998.
• Pasi Fränti, Juha Kivijärvi, Timo Kaukoranta, Olli Nevalainen, Genetic algorithm for codebook generation in VQ. In: Proc. 3rd Nordic Workshop on Genetic Algorithms, 207--222, 1997.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, Blockwise Distortion Measure in Image Compression. In: Proc. Very High Resolution and Quality Imaging, San Jose, CA, SPIE, 2663, 78--87, SPIE, 1996.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Empirical Study on Subjective Quality Evaluation of Compressed Images. In: Proc. Very High Resolution and Quality Imaging, San Jose, CA, SPIE, 2663, 88--99, SPIE, 1996.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, A New Approach to BTC-VQ Image Compression System. In: Proc. Picture Coding Symposium, Sacramento, CA, 162--165, 1994.

Ph.D. thesis (1):

• Pasi Fränti, Block Coding in Image Compression. 1994.

Technical reports (17):

• Olli Virmajoki, Pasi Fränti, Timo Kaukoranta, Iterative shrinking method for the clustering problem. 0, 2001.
• Olli Virmajoki, Pasi Fränti, Timo Kaukoranta, Practical methods for speeding-up the PNN method. 0, 2000.
• Pasi Fränti, Timo Kaukoranta, Fast Implementation of the Exact PNN Algorithm. TUCS Technical Reports 295, Turku Centre for Computer Science, 1999.
• Pasi Fränti, Juha Kivijärvi, Randomized local search algorithm for the clustering problem. 0, 1999.
• Juha Kivijärvi, Pasi Fränti, Olli Nevalainen, Self-Adaptive Genetic Algorithm for Clustering. TUCS Technical Reports 308, Turku Centre for Computer Science, 1999.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Vector Quantizationby Lazy Pairwise Nearest Neighbor Method. TUCS Technical Reports 180, Turku Centre for Computer Science, 1998.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, On the splitting method for VQ codebook generation. 0, 1997.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Iterative Split-and-Merge Algorithm for VQ Codebook Generation. TUCS Technical Reports 154, Turku Centre for Computer Science, 1997.
• Pasi Fränti, Juha Kivijärvi, Timo Kaukoranta, Olli Nevalainen, Genetic algorithm for codebook generation in vector quantization. 0, 1996.
• Pasi Fränti, Juha Kivijärvi, Olli Nevalainen, Tabu search algorithm for codebook generation in vector quantization. 0, 1996.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Reallocation of GLA Codevectors for Evading Local Minimum. TUCS Technical Reports 25, Turku Centre for Computer Science, 1996.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Empirical Study on Subjective Quality Evaluation of Compressed Images. 0, 1996.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, Blockwise Distortion Measure in Image Compression. 2, 1995.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Quality Measures in Image Compression. 0, 1995.
• Timo Kaukoranta, Pasi Fränti, Olli Nevalainen, Empirical Study on Subjective Quality Evaluation of Compressed Images. 4, 1995.
• Pasi Fränti, Timo Kaukoranta, Olli Nevalainen, On the Design of a Hierarchical BTC-VQ Compression System. 0, 1994.
• Pasi Fränti, Olli Nevalainen, Block truncation coding with entropy coding. 0, 1994.