+}
+@ARTICLE{4310076,
+journal={Systems, Man and Cybernetics, IEEE Transactions on},
+title={A Threshold Selection Method from Gray-Level Histograms},
+author={Otsu, N.},
+year={1979},
+volume={9},
+number={1},
+pages={62-66},
+keywords={Displays;Gaussian distribution;Histograms;Least squares approximation;Marine vehicles;Q measurement;Radar tracking;Sea measurements;Surveillance;Target tracking},
+doi={10.1109/TSMC.1979.4310076},
+ISSN={0018-9472},}
+@article{Zahn:1971:GMD:1309266.1309359,
+ author = {Zahn, C. T.},
+ title = {Graph-Theoretical Methods for Detecting and Describing Gestalt Clusters},
+ journal = {IEEE Trans. Comput.},
+ issue_date = {January 1971},
+ volume = {20},
+ number = {1},
+ month = jan,
+ year = {1971},
+ issn = {0018-9340},
+ pages = {68--86},
+ numpages = {19},
+ url = {http://dx.doi.org/10.1109/T-C.1971.223083},
+ doi = {10.1109/T-C.1971.223083},
+ acmid = {1309359},
+ publisher = {IEEE Computer Society},
+ address = {Washington, DC, USA},
+ keywords = {Clustering, data structure analysis, feature space evaluation, gestalt psychology, graph theory, minimal spanning trees, nearest neighbor methods, numerical taxonomy, pattern recognition.},
+}
+@article{wu1993optimal,
+ title={An optimal graph theoretic approach to data clustering: Theory and its application to image segmentation},
+ author={Wu, Zhenyu and Leahy, Richard},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={15},
+ number={11},
+ pages={1101--1113},
+ year={1993},
+ publisher={IEEE}
+}
+@article{felzenszwalb2004efficient,
+ title={Efficient graph-based image segmentation},
+ author={Felzenszwalb, Pedro F and Huttenlocher, Daniel P},
+ journal={International Journal of Computer Vision},
+ volume={59},
+ number={2},
+ pages={167--181},
+ year={2004},
+ publisher={Springer}
+}
+@inproceedings{wang2001image,
+ title={Image segmentation with minimum mean cut},
+ author={Wang, Song and Siskind, Jeffrey Mark},
+ booktitle={Computer Vision, 2001. ICCV 2001. Proceedings. Eighth IEEE International Conference on},
+ volume={1},
+ pages={517--524},
+ year={2001},
+ organization={IEEE}
+}
+@article{wang2003image,
+ title={Image segmentation with ratio cut},
+ author={Wang, Song and Siskind, Jeffrey Mark},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={25},
+ number={6},
+ pages={675--690},
+ year={2003},
+ publisher={IEEE}
+}
+@article{shi2000normalized,
+ title={Normalized cuts and image segmentation},
+ author={Shi, Jianbo and Malik, Jitendra},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={22},
+ number={8},
+ pages={888--905},
+ year={2000},
+ publisher={IEEE}
+}
+@inproceedings{macqueen1967some,
+ title={Some methods for classification and analysis of multivariate observations},
+ author={MacQueen, James and others},
+ booktitle={Proceedings of the fifth Berkeley symposium on mathematical statistics and probability},
+ volume={1},
+ number={281-297},
+ pages={14},
+ year={1967},
+ organization={California, USA}
+}
+@article{agarwal2002exact,
+ title={Exact and approximation algorithms for clustering},
+ author={Agarwal, Pankaj K and Procopiuc, Cecilia Magdalena},
+ journal={Algorithmica},
+ volume={33},
+ number={2},
+ pages={201--226},
+ year={2002},
+ publisher={Springer}
+}
+@inproceedings{arora1998approximation,
+ title={Approximation schemes for Euclidean k-medians and related problems},
+ author={Arora, Sanjeev and Raghavan, Prabhakar and Rao, Satish},
+ booktitle={Proceedings of the thirtieth annual ACM symposium on Theory of computing},
+ pages={106--113},
+ year={1998},
+ organization={ACM}
+}
+@inproceedings{pelleg2000x,
+ title={X-means: Extending K-means with Efficient Estimation of the Number of Clusters.},
+ author={Pelleg, Dan and Moore, Andrew W and others},
+ booktitle={ICML},
+ pages={727--734},
+ year={2000}
+}
+@article{fukunaga1975estimation,
+ title={The estimation of the gradient of a density function, with applications in pattern recognition},
+ author={Fukunaga, Keinosuke and Hostetler, Larry},
+ journal={Information Theory, IEEE Transactions on},
+ volume={21},
+ number={1},
+ pages={32--40},
+ year={1975},
+ publisher={IEEE}
+}
+@article{cheng1995mean,
+ title={Mean shift, mode seeking, and clustering},
+ author={Cheng, Yizong},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={17},
+ number={8},
+ pages={790--799},
+ year={1995},
+ publisher={IEEE}
+}
+@book{foley1994introduction,
+ title={Introduction to computer graphics},
+ author={Foley, James D and Van Dam, Andries and Feiner, Steven K and Hughes, John F and Phillips, Richard L},
+ volume={55},
+ year={1994},
+ publisher={Addison-Wesley Reading}
+}
+@inproceedings{comaniciu1999mean,
+ title={Mean shift analysis and applications},
+ author={Comaniciu, Dorin and Meer, Peter},
+ booktitle={Computer Vision, 1999. The Proceedings of the Seventh IEEE International Conference on},
+ volume={2},
+ pages={1197--1203},
+ year={1999},
+ organization={IEEE}
+}
+@article{comaniciu2002mean,
+ title={Mean shift: A robust approach toward feature space analysis},
+ author={Comaniciu, Dorin and Meer, Peter},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={24},
+ number={5},
+ pages={603--619},
+ year={2002},
+ publisher={IEEE}
+}
+@inproceedings{keselman1998extraction,
+ title={Extraction and characterization of regions of interest in biomedical images},
+ author={Keselman, Yakov and Micheli-Tzanakou, EVANGELIA},
+ booktitle={Information Technology Applications in Biomedicine, 1998. ITAB 98. Proceedings. 1998 IEEE International Conference on},
+ pages={87--90},
+ year={1998},
+ organization={IEEE}
+}
+@article{osher1988fronts,
+ title={Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations},
+ author={Osher, Stanley and Sethian, James A},
+ journal={Journal of computational physics},
+ volume={79},
+ number={1},
+ pages={12--49},
+ year={1988},
+ publisher={Elsevier}
+}
+@phdthesis{adalsteinsson1994fast,
+ title={A fast level set method for propagating interfaces},
+ author={Adalsteinsson, David and Sethian, James},
+ year={1994},
+ school={University of California}
+}
+@article{sethian1996fast,
+ title={A fast marching level set method for monotonically advancing fronts},
+ author={Sethian, James A},
+ journal={Proceedings of the National Academy of Sciences},
+ volume={93},
+ number={4},
+ pages={1591--1595},
+ year={1996},
+ publisher={National Acad Sciences}
+}
+@article{cohen1993surface,
+ title={Surface reconstruction using active contour models},
+ author={Cohen, Laurent D and Bardinet, Eric and Ayache, Nicholas and others},
+ year={1993}
+}
+@article{ronfard1994region,
+ title={Region-based strategies for active contour models},
+ author={Ronfard, R{\'e}mi},
+ journal={International Journal of Computer Vision},
+ volume={13},
+ number={2},
+ pages={229--251},
+ year={1994},
+ publisher={Springer}
+}
+@article{arbelaez2011contour,
+ title={Contour detection and hierarchical image segmentation},
+ author={Arbelaez, Pablo and Maire, Michael and Fowlkes, Charless and Malik, Jitendra},
+ journal={Pattern Analysis and Machine Intelligence, IEEE Transactions on},
+ volume={33},
+ number={5},
+ pages={898--916},
+ year={2011},
+ publisher={IEEE}
+}
+@INPROCEEDINGS{6005963,
+author={Lanfang Dong and Jiahui Chen and Jin Wang},
+booktitle={Image and Graphics (ICIG), 2011 Sixth International Conference on},
+title={A Real-Time Isoline Tracing Algorithm Based on CUDA},
+year={2011},
+pages={864-867},
+keywords={data visualisation;multi-threading;GPU multithread;compute unified device architecture;graphics processing unit;isoline tracing algorithm;reservoir simulation visualization;texture memory;Algorithm design and analysis;Arrays;Data visualization;Graphics processing unit;Indexes;Instruction sets;Real time systems;CUDA;Isoline Tracing;Real-time},
+doi={10.1109/ICIG.2011.117},}
+@article{bertaux2004speckle,
+ title={Speckle removal using a maximum-likelihood technique with isoline gray-level regularization},
+ author={Bertaux, Nicolas and Frauel, Yann and R{\'e}fr{\'e}gier, Philippe and Javidi, Bahram},
+ journal={JOSA A},
+ volume={21},
+ number={12},
+ pages={2283--2291},
+ year={2004},
+ publisher={Optical Society of America}