[1] V. Pătraşcu. The Spherical Coordinates of Color Space. The 7^th Conference on Applied and Industrial Mathematics, CAIM’99, Piteşti, România, 15-17 Oct. 1999.

[2] V. Pătraşcu, The means of k-order for a real random variable, In Proc. of the 28^th International Workshop of the Military Technical Academy, pp 174-177, Bucureşti, România, 21-22 Oct. 1999.

[3] V. Pătraşcu. The algebras in the space of colors. In Proc. of the 28^th International Workshop of the Military Technical Academy, pp 178-185, Bucureşti, România, 21-22 Oct. 1999.

[4] V. Pătraşcu, I. Voicu. An Algebraical Model for Gray Level Images. In Proc. of the 7^th International Conference, Exhibition on Optimization of Electrical and Electronic Equipment, OPTIM 2000, pp. 809-812, Braşov, România, 11-12 May 2000.

[5] V. Pătraşcu, V. Buzuloiu, “Color Image Enhancement in the Framework of Logarithmic Models”, The 8^th IEEE International Conference on Telecommunications, Vol. 1, pp. 199-204, ICT2001, June 4 - 7, 2001, Bucharest, Romania.

[6] V. Pătraşcu, V. Buzuloiu, “A Mathematical Model for Logarithmic Image Processing”, The 5^th World Multi-Conference on Systemics, Cybernetics and Informatics, Vol 13, pp. 117-122, SCI2001, July 22-25, 2001, Orlando, USA.

[7] V. Pătraşcu, V. Buzuloiu, Edge detection by contrast formulas in the logarithmic models. In Proc. of the 8^th International Conference, Exhibition on Optimization of Electrical and Electronic Equipment, OPTIM 2002,Vol. III, pp. 751-756, Braşov, România, 16 - 17 May 2002.

[8] V. Pătraşcu. Gray Level Image Enhancement Using Polygonal Functions. In Proc. of the IEEE-tttc International Conference on Automation, Quality and Testing, Robotics, AQTR 2002 (THETA 13), in vol. Robotics, Image and Signal Processing, pp. 129-134, May 23 – 25, 2002, Cluj-Napoca, Romania

[9] V. Pătraşcu, A Fuzzy Clustering Algorithm Using A Multiparametric Point–To-Set Distance, Proceedings of the 6^th World Multiconference on Systemics, Cybernetics and Informatics, SCI 2002, Vol. XI, Computer Science II: Modeling, Graphs and Algorithms, pp. 250-255, July 14-18, 2002, Orlando, Florida, USA.

[10] V. Pătraşcu, V. Buzuloiu, The Affine Transforms for Image Enhancement in the Context of Logarithmic Models, Proceedings of International Conference on Computer Vision and Graphics, Vol. 2, pp. 596-601, ICCVG 2002, September 25-29, 2002, Zakopane, Poland.

[11] V. Pătraşcu, V. Buzuloiu, Image Dynamic Range Enhancement in the Context of Logarithmic Models, The 11^th European Signal Processing Conference, EUSIPCO 2002, Vol. III, pp 251-254, September 3-6, 2002, Toulouse, France.

[12] V. Pătraşcu, Gray level image enhancement using Bernstein polynomials, Periodica Politechnica, Transactions on Electronics and Communications, “Politehnica” University of Timisoara, Tome 47(61), Fascicola 1-2, 2002, Special Issue dedicated to 5^th Symposium on Electronics and Telecommunications, ETC 2002, Vol. 1, pp 146-151, September 19-20, 2002, Timisoara, Romania.

[13] V. Pătraşcu, Image Enhancement Using The Mean Dynamic Range Maximization With Logarithmic Operations, Periodica Politechnica, Transactions on Automatic Control and Computer Science, “Politehnica” University of Timisoara, Tome 47(61), No. 2, 2002, Special Issue dedicated to 5^th International Conference on Technical Informatics, CONTI 2002, pp 121-126, October 18-19, 2002, Timisoara, Romania.

[14] V. Pătraşcu, Logarithmic Image Enhancement Using the Image Support Fuzzification, Symbolic and Numeric Algorithms for Scientific Computing, (Eds. D. Petcu, V. Negru, D. Zaharie, T. Jebeleanu), MIRTON Press, Timisoara, 2002, Proceeding for 4^th International Workshop SYNASC 02, pp 253-262, October 9-12, 2002, Timisoara, Romania.

[15] V. Pătraşcu, V. Buzuloiu, Modelling of Histogram Equalisation with Logarithmic Affine Transforms, Recent Trends in Multimedia Information Processing, (Ed. Panos Liatsis), World Scientific Press, 2002, Proceedings of the 9^th International Workshop on Systems, Signals and Image Processing, IWSSIP’02, pp. 312-316, November 7-8, 2002, Manchester, United Kingdom.

[16] V. Pătraşcu, Image Enhancement Using a Generalization of Homographic Function, The IEEE International Conference COMMUNICATIONS 2002, pp. 429-434, December 5-7, 2002, Bucharest, Romania.

[17] V. Pătraşcu, V. Buzuloiu, C. Vertan, Fuzzy Image Enhancement in the Framework of Logarithmic Model, Chap. 10 in Fuzzy Filters for Image Processing, (Eds. M. Nachtegael, E. Kerre), pp 219-237, Springer Verlag, Germany, March, 2003 .

[18] V. Pătraşcu, Fuzzy Image Enhancement Using the Logarithmic Model, Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 43, Nr. 1, 2003 pp. 9-14, Cluj-Napoca, Romania.

[19] V. Pătraşcu, Medical Image Enhancement in the Context of Fuzzy Set Theory, In proceedings of The First South-East European Symposium on Interdisciplinary Approaches in Fractal Analysis, IAFA’03, pp. 261-266, 7-10 May, 2003, Bucharest, Romania.

[20] V. Pătraşcu, Gray Level Image Enhamcement using the Support Fuzzification in the Framework of Logarithmic Models, In proceedings of the International Conference Model-based Imaging, Rendering, Image Analysis and Graphical Special Effects, Mirage 2003, pp. 123-128, INRIA Rocquencourt, 10-12 March, 2003, France.

[21] V. Pătraşcu, Gray level image processing using algebraic structures, Proceedings of the 11^th Conference on applied and industrial mathematics, ( Eds. T. Maghiar, A. Georgescu, M. Balaj, I. Dzitac, I. Mang), May 29-31, 2003, Vol. 1, pp. 167-172, Oradea, Romania.

[22] V. Pătraşcu, V. Buzuloiu, Color correction method using logarithmic operations, Proceedings of the 7^th International Conference on Engineering of Modern Electric Systems, EMES’03, Oradea, Romania, pp. 150-155, May 29-31, 2003.

[23] V. Pătraşcu, Color Image Enhancement Using the Support Fuzzification, In Fuzzy Sets and Systems – IFSA 2003, Vol LNAI 2715, (Eds. T. Bilgiç, B. De Baets, O. Kaynak), Springer-Verlag Berlin Heidelberg 2003, Proceedings of the 10th International Fuzzy Systems Association World Congress, pp. 412-419, June 30 – July 2, 2003, Istanbul, Turkey.

[24] V. Pătraşcu,V. Buzuloiu, Color Image Processing Using Logarithmic Operations, In Proceedings of The IEEE International Symposium on Signals, Circuits and Systems, SCS 2003, pp. 133-136, July 10-11, 2003, Iasi, Romania.

[25] S. Ciurel, V. Buzuloiu, V. Pătraşcu, Multiwavelets in MRI, In Proceedings of The IEEE International Symposium on Signals, Circuits and Systems, SCS 2003, pp. 149-152, July 10-11, 2003, Iasi, Romania.

[26] V. Pătraşcu, Gray Level image Enhancement Method Using the Logarithmic Model, Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 43, Nr. 2, 2003 pp. 39-50, Cluj-Napoca, Romania.

[27] V. Pătraşcu, Color image enhancement using the lrgb coordinates in the context of support fuzzification, CD-Proceedings of the Symposium on Inteligent Systems and Applications, SSIA’2003, (Eds. H.N. Teodorescu, C. Gaindric, E. Sofron), Iasi, Romania, 19-20 September, 2003.

[28] V. Pătraşcu, V. Buzuloiu, The mean dynamic range optimization in the framework of logarithmic models, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, (Eds. O. Iancu, A. Manea, D. Cojoc), Proc. SPIE, Vol. 5227, Oct. 2003, pp. 73-80.

[29] V. Pătraşcu, Color image enhancement using the separated modification of luminosity and saturation, Proceedings of the 30^th Internationally Attended Scientific Conference of the Military Technical Academy “Modern Technologies in the 21^st Century”, pp. 161-168, 6-7 November, 2003, Bucharest, Romania.

[30] V. Pătraşcu, Image Enhancement Method Using a New Measure for Mean Dynamic Range, Proceedings of the conference IPMU’04, Information Processing and Management of Uncertainly in Knowledge-Based Systems, pp. 1921-1928, July 4-9, 2004, Perugia, Italy.

[31] V. Pătraşcu, Color Image Enhancement Using the Lrgb Coordinates in the Context of Fuzzy Sets Theory, The 8th World Multiconference on Systemics, Cybernetics and Informatics, Vol. 6, ISBN 980-6560-13-2, July 18 - 21, 2004 Orlando, Florida, USA

[32] V. Pătraşcu, Image enhancement methods using high order statistics, Acta Tehnica Napocensis, Electronics and Telecommunications, Vol. 44, Nr. 2, 2004 pp. 38-47, Cluj-Napoca, Romania.

[33] V. Pătraşcu, Image enhancement method using piecewise linear transforms, Proceedings of the 12th European Signal Processing Conference, EUSIPCO-2004, pp. 577-580, September 6-10, 2004, Vienna, Austria.

[34] V. Pătraşcu, Fuzzy Enhancement Method Using Logarithmic Models, Proceedings of the 13^th IEEE International Conference on Fuzzy Systems, FUZZ-IEEE2004, Vol. 3, pp. 1431-1436, CD-ROM index 0252-1247.pdf, Budapest, Hungary, 25-29 July, 2004.

[35] V. Pătraşcu, Color Image Enhancement Method Using Fuzzy Surfaces in the Framework of the Logarithmic Models, In vol. Applied Computational Intelligence, (Eds. D. Ruan, P. D'hondt, M. De Cock, M. Nachtegael & E. E. Kerre), World Scientific Press, 2004, ISBN 981-238-873-7, Proceedings of the 6th International FLINS Conference, FLINS 2004, pp. 403-408, Blankenberge, Belgium, 1 - 3 September, 2004.

[36] V. Pătraşcu, Color Image Enhancement Using the lrgb Coordinates in the Context of Support Fuzzification, Romanian Academy Journal, Fuzzy systems & A. I. , Reports and Letters, F.S.A.I., Vol. 10, Nos. 1–2, pp29-42, 2004.

[37] V. Pătraşcu, Gray Level Image Enhancement Using Piecewise Linear Functions, In proceedings of the 7^th IEEE International Symposium on Signals, Circuits and Systems, ISSCS05, pp. 211-214, 14-15 July, 2005, Iasi, Romania.

[38] V. Pătraşcu, Color Image Enhancement Method Using Three Parameters Affine Transform, In proceedings of the 7^th IEEE International Symposium on Signals, Circuits and Systems, ISSCS05, pp. 215-218, 14-15 July, 2005, Iasi, Romania.

[39] V. Pătraşcu, A generalization of fuzzy c-means algorithm using a new dissimilarity function, Proceedings of the 11^th International Fuzzy Systems Association World Congress, IFSA 2005, (Eds. Y. Liu, G. Chen, M. Ying), Tsinghua University Press-Springer, ISBN: 7-302-11377-7, July 28-31, 2005, Beijing, China.

[40] V. Pătraşcu, A Generalization of Gustafson-Kessel Algorithm Using a New Constraint Parameter, In Proceedings of the 4^th Conference of the European Society for Fuzzy Logic and Technology and 11^th Rencontres Francophones sur la Logique Floue et ses Applications, EUSFLAT-LFA 2005, 7-9 September, 2005, Barcelona, Spain.

[41] V. Pătraşcu, A generalization of Gustafson-Kessel algorithm using a new constraint parameter, In CD-proceedings of the 7^th International Workshop on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2005, 25-29 September, 2005, Timisoara, Romania.

[42] V. Pătraşcu, A fuzzy clustering algorithm using a new dissimilarity function, In CD-proceedings of the 31^th Internationally Attended Conference “Modern Technologies in the XXI century”, Military Technical Academy, 03-04 November, 2005, Bucharest, Romania.

[43] V. Pătraşcu, Fuzzy Method for Piecewise Polynomial Approximation with Free Knots, proceedings of the conference Information Processing and Management of Uncertainly in Knowledge-Based Systems, IPMU 2006, Paris, France, 2-7 July 2006.

[44] V. Pătraşcu, Fuzzy Set Based on Four-Valued Logic, Proceedings of International Conference on Computers, Communications & Control, ICCC 2006, pp.360-365, Baile Felix Spa-Oradea, Romania, 1-3 June 2006.

[45] V. Pătraşcu, Rough Sets on Four-Values Fuzzy Approximation Spaces, in the CD-Proceedings of the European Conference on Intelligent System, ECIT 2006, Iasi, Romania, 21-23 Sept., 2006.

[46] V. Pătraşcu, Fuzzy Image Segmentation Based on Triangular Function and Its n-dimensional Extension, in the volume Soft Computing in Image Processing. Recent Advances, Series: Studies in Fuzziness and Soft Computing, pp 187-208, Vol. 210 , (Eds.) M. Nachtegael, D. Van der Weken, E. E. Kerre, W. Philips, ISBN: 3-540-38232-1, Springer-Verlag, 2007.