Commenced in January 2007
Paper Count: 30184
Automatic Lip Contour Tracking and Visual Character Recognition for Computerized Lip Reading
Abstract:Computerized lip reading has been one of the most actively researched areas of computer vision in recent past because of its crime fighting potential and invariance to acoustic environment. However, several factors like fast speech, bad pronunciation, poor illumination, movement of face, moustaches and beards make lip reading difficult. In present work, we propose a solution for automatic lip contour tracking and recognizing letters of English language spoken by speakers using the information available from lip movements. Level set method is used for tracking lip contour using a contour velocity model and a feature vector of lip movements is then obtained. Character recognition is performed using modified k nearest neighbor algorithm which assigns more weight to nearer neighbors. The proposed system has been found to have accuracy of 73.3% for character recognition with speaker lip movements as the only input and without using any speech recognition system in parallel. The approach used in this work is found to significantly solve the purpose of lip reading when size of database is small.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1074397Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2017
 H. McGurk, J. MacDonald, "Hearing lips and seeing voices," J. Nature, vol. 264(5588), 1976, pp 746-748.
 W.C. Yau. (2009). Computer-based lip-reading using motion templates
[Online]. Available: http://www.ieeevic.org/events/getdetails.php?id=234(URL)
 T.F. Cootes, A. Hill, C.J. Taylor, J. Haslam, "The use of active shape models for locating structures in medical images," J. Image Vis. Comput. vol. 12 Issue 6, 1994, pp 355-366.
 T.F. Cootes, C.J. Taylor, D.H. Cooper, J. Graham, "Active shape models- Their training and application," J. Comput. Vis. Image Underst. vol 61 Issue 1, 1995, pp 38-59.
 I. Matthews, T.F. Cootes, J.A. Bangham, S. Cox, R. Harvey, "Extraction of visual features for lipreading," IEEE Trans. Pattern Anal. Mach. Intell. vol. 24 Issue 2, pp 198-213, 2002.
 T.F. Cootes, G.J. Edwards, C.J. Taylor, "Active appearance models," in Proc. European Conf. Comput. Vis., June 1998, pp. 484-498.
 M. Kass, A. Witkin, D. Terzopoulos, "Snakes: Active contour model," Int. J. Comput. Vis. vol. 1, 1987, pp 321-331.
 A. Souza, J.K. Udupa, "Automatic landmark selection for active shape models- Medical imaging: Image Processing", in Proc. of the SPIE, Vol. 5747,2005, pp. 1377-1383.
 K. Domijan, S. Wilson, "A Bayseian method for automatic landmark detection in segmented images," in Proc. of the workshop on Mach. Learning Techniques for Processing Multimedia Content, Bonn Germany, 2005.
 N. Eveno, A. Caplier, P.Y. Coulon, "New color transformation for lips segmentation," in Proc. IEEE 4th Workshop Multimedia Signal Proc., France, 2001, pp. 3-8.
 T. Wark, S. Sridharan, V. Chandran, "An approach to statistical lip modeling for speaker identification via Chromatic Feature Extraction," in Proc. 4th Intl. Conf. Pattern Recognition., Brisbane, Australia, 1998, pp. 123-125.
 S. Osher, J.A. Sethian, "Fronts propagating with curvature dependent speed: Algorithms based on Hamilton-Jacobi formulations," J. Comput. Phys. vol. 79 Issue 1, 1988, 12-49.
 A. Sayeed Md. Sohail, P. Bhattacharya, "Automated lip contour detection using the level set segmentation method," Int. Conf. on Image Anal. and Proc. (ICIAP 2007), pp. 425-430.
 H. Mehrotra, G. Agrawal, M.C. Srivastava, "Automatic lip contour extraction using level set evolution, 3rd Int. Conf. on Information Proc., (ICIP 2009) Bangalore, to be published.
[Online], Available: http://en.wikipedia.org/wiki/Video tracking (URL)
 Y.M. Kim, Object tracking in video sequence,
[Online], Available: http://www.stanford.edu/Ôê╝jinhae/CS229 report.pdf(URL).
 D.G. Lowe, "Distinctive image features from scale-invariant keypoints," Int. J. Comput. Vis. vol.60 Issue 2, 2004, pp 91-110.
 G. Welch, G. Bishop, "An introduction to Kalman filter," Technical report: TR95-041, July 24, 2006.
[Online], Available: http://www.cs.unc.edu/Ôê╝welch/media/pdf/kalman intro.pdf(URL).
 Y. Tian, T. Kanade, J.F. Cohn, "Robust lip tracking by combining shape, color and motion," in Proc. of the 4th Asian Conf. on Comput. Vis. (ACCV-00), Jan, 2000, pp. 1040-1045.
 J. Chen, Y. Laprie, M.O. Berger, "A robust lip tracking system for acoustic to articulatory inversion," The 6th IASTED Int. Conf. on Signal and Image Proc., August 2004, USA.
 E.D. Petajan, "Automatic lipreading to enhance speech recognition," in Proc. of the IEEE Communication Society Global Telecommunications Conference", November 26-29, 1984, Atlanta, Georgia.
 E.D. Petajan, B. Bischoff, D. Bodoff, "An improved automatic lipreading system to enhance speech recognition," ACM SIGCHI-88, 19-25 (1988).
 A.J. Goldschen, O.N. Garcia, E. Petajan, "Continuous optical automatic speech recognition by lipreading," 28th Annual Asilmomar Conference on Signals, Systems, and Computer, 1994.
 A. Pentland, K. Mase, "Lip reading: Automatic visual recognition of spoken words," in Proc. Image Understanding and Mach. Vis., Optical Society of America, June 12-14 (1989).
 S. Pachoud, S. Gong, A. Cavallaro, "Macro-cuboid based probabilistic matching for lip-reading digits," IEEE Computer Society Conf. on Comput. Vis. and Pattern Recognition (CVPR), USA, June 2008
 Y. Qu, P.A. Heng, T.T. Wong, "Image segmentation using the level set method," in: Deformable Models II: Theory and Biomaterial Applications, J.S. Suri, A. Farag, Ed, Springer, 2007,pp. 95-122.
 M. Sussman, P. Smereka, S. Osher, "A level set approach for computing solutions to incompressible two-phase flow," J. Comput. Phys. vol 114, 1994, pp 146-159.
 D. Peng, B. Merriman, S. Osher, H. Zhao, M. Kang, "A PDE based fast local level set method," J. Comp. Phys. Vol. 155, 1999, pp. 410-438.
 Wikipedia Online, Available: http://en.wikipedia.org/wiki/Knearest neighbor algorithm(URL).
 R. Malladi, J.A. Sethian, B.C. Vemuri, "Shape modeling with front propagation: A level set approach," IEEE Trans on Pattern Anal. and Mach. Intell., Vol. 17, 1995, pp. 158-175.
 S. Osher, R.P. Fedkiw, "Motion involving mean curvature," in: Level set methods and dynamic implicit surfaces, Springer, 2002, pp. 41-46.