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IPCV 2009: Las Vegas, Nevada, USA
- Hamid R. Arabnia, Gerald Schaefer:
Proceedings of the 2009 International Conference on Image Processing, Computer Vision, & Pattern Recognition, IPCV 2009, July 13-16, 2009, Las Vegas, Nevada, USA, 2 Volumes. CSREA Press 2009, ISBN 1-60132-119-8
Novel Applications + Algorithms
- Adele P. Peskin, Karen Kafadar, A. M. Santos, Gillian Haemer:
Robust Volume Calculations of Tumors of Various Sizes. IPCV 2009: 3-9 - Xiaojing Ye, Yunmei Chen, Feng Huang:
MR Image Reconstruction via Sparse Representation: Modeling and Algorithm. IPCV 2009: 10-16 - Catherine Wah, Dennis J. Lin, Thomas S. Huang:
Anthropometric Human Hand Models for Tracking. IPCV 2009: 17-22 - M. V. Rohith, Gowri Somanath, Chandra Kambhamettu, Cathleen A. Geiger:
Stereo Analysis of Low Textured Regions with Application Towards Sea-ice Reconstruction. IPCV 2009: 23-29 - Zhijie Wang, Hong Zhang:
Joint Detection and Tracking of Multiple Objects in Occlusion Situations. IPCV 2009: 30-36 - Lior Shamir, Nikita Orlov, Ilya G. Goldberg:
Evaluation of the Informativeness of Multi-order Image Transforms. IPCV 2009: 37-42 - Adele P. Peskin, Karen Kafadar, Alden Dima, Javier Bernal, David Gilsinn:
Synthetic Lung Tumor Data Sets for Comparison of Volumetric Algorithms. IPCV 2009: 43-47 - Yu-Chi Hu, Michael Grossberg, Gig S. Mageras:
Volumetric Medical Image Segmentation with Probabilistic Conditional Random Fields Framework. IPCV 2009: 48-53 - Da-Xing Zhao, Xiao-Chun Song, Yao-He Liu:
Research on Fabric Real-Time Detection System Based on Machine Vision. IPCV 2009: 54-58 - Hong-Dar Lin, Yuan-Shyi Peter Chiu, Wan-Ting Lin:
Automated Industrial Inspection of Light-emitting Diodes Using Computer Vision. IPCV 2009: 59-65 - Hossein Tohidi, Alireza Mustafa, Alireza Sojoodi, Mohammad Amin Kaviani, Abouzar Ostadi, Hossein Khaledi, Mahmood Rahimi, Mahmoud Talafi Noghani, Ahmad Poursaberi, Saed Salem, Hossein Razizade, Sadegh Salem, Majid Asgari, Mohammad Salehi:
A Vision Based Law Enforcement System. IPCV 2009: 66-71 - Bob Zhang, Jane You, Fakhri Karray, Chea-su Kee, Qin Li:
Astigmatism and Eye Shape. IPCV 2009: 72-77 - Yonghui Gao, Jie Yang, Lv Guo:
Efficient Artery Segmentation Based on Improved Nonlinear Coherent Diffusion Speckle Denoising in Ultrasound Heart Images. IPCV 2009: 78-82 - P. Swarnalatha, Madhuri Kota, Nagarjuna Reddy Resu, G. Srivasanth:
Automated Assessment Tool for the Depth of Pipe Deterioration. IPCV 2009: 83-86 - Jiman Ryu, Taeyoung Jung, Jechang Jeong:
Adaptive Directional Demosaicing. IPCV 2009: 87-92 - Mihai Ivanovici, Noël Richard, Vasile Buzuloiu:
Colour Fractal Image Generation. IPCV 2009: 93-96 - Nadeem Salamat, El-hadi Zahzah:
Fuzzy Histogram for Internal and External Fuzzy Directional Relations. IPCV 2009: 97-101 - Kamil Mrazek:
Web Control of Mechanical System by Light Ray. IPCV 2009: 102-106 - Mohammad Afaneh, Jeff Mulligan, Mohamed El-Sharkawy, Maher E. Rizkalla:
Detection of Pupil Contour and Center in Eye Images Captured in Uncontrolled Illumination Environments. IPCV 2009: 107-113 - Changxin Gao, Nong Sang, Qiling Tang, Ruolin Wang:
Improved AdaBoost Algorithm Combining Distance Related Criterion. IPCV 2009: 114-120 - VietAnh Ngo, Wenxian Yang, Jianfei Cai:
Multiple View Soccer Players Tracking Using Area-of-Coverage. IPCV 2009: 121-126 - Alireza Haghshenas, Mahmoud Fathy, Maryam Mokhtari:
3D Shape Extraction of Automobiles from Uncalibrated Images. IPCV 2009: 127-132 - Asif Shah, Muhammad Naeem, Wajiha Shah, Clemens Brunner, Muhammad Mahmood Aslam, Gert Pfurtscheller:
Outlier Detection In Common Spatial Patterns. IPCV 2009: 133-136 - Ba Linh Nguyen, Youssef Chahir, François Jouen:
Free Eye Gaze Tracking using Gaussian Processes. IPCV 2009: 137-141 - Robert Azencott, Yipeng Li, Dirar Khoury:
Space/Time Modulation of Speckle Noise and Multiscale Speckle Tracking in Intracardiac Echocardiography. IPCV 2009: 142-146 - Peijiang Yuan, Bo Zhang, Jianmin Li, Julei Wang, Guodong (Gordon) Gao:
A Machine Learning Technique to Detect and Predict Parkinson's Disease. IPCV 2009: 147-152 - Kwang-Jung Kim, Myung-Sub Lee, Ju H. Park, Chang-Hyeon Park:
Polygon Detection Using Relationships of Lines in Images. IPCV 2009: 153-157 - Marius Brezovan, Dumitru Dan Burdescu, Eugen Ganea, Liana Stanescu:
Normalized Curve Signatures for Shape Representation and Retrieval. IPCV 2009: 158-164 - Tieling Chen, Jinfei Wang, Kaizhong Zhang, William Tompkinson:
Edge Extraction with Gradient Directions. IPCV 2009: 165-169 - Gwang Geun Ryu, Il Hong Suh, Sanghoon Lee:
Covert Visual Attention by Object-based Selective Visual Features and Their Saliency Map. IPCV 2009: 170-173 - Cherng-Min Ma:
A Geometry Preserving Thinning Algorithm on Binary Images. IPCV 2009: 174-179 - Hee-Joong Kang:
Selection of Multiple Classifiers with No Prior Limit to the Number of Selected Classifiers by Minimizing the Conditional Entropy. IPCV 2009: 180-185 - Dae-Hyeon Kim, Byoung-Ik Kim, Su-Young Ha, Tae-Eun Shim, Young-Choon Kim, Kyu-Ik Sohng:
An Automatic Warping Points Extraction Method for Calibration of Wide Angle Camera. IPCV 2009: 186-190 - Lukasz Bronakowski, Krzysztof Slot:
Detection of Speech in Noisy Signals Using Fractal Dimension. IPCV 2009: 191-196 - Thiago Nobrega, Ivon Wilson, Humberto Barbosa:
VIEWSATT - a Decoding and Processing Software Tool for MSG Data. IPCV 2009: 197-201 - Alaa F. Sheta, Mohammad Salamah:
A Multistage Image Processing Methodology for Landmine Detection Using an Innovative NXT Mobile Robot System. IPCV 2009: 202-208 - Stephan Rupp, Christian Winter, Christine Steenkamp:
Imaging Models For The Evaluation Of Fiber-Optic Image Processing Algorithms. IPCV 2009: 209-215 - Bekir Dizdaroglu, Cevat Ikibas:
A Seamless Image Editing Technique Using Color Information. IPCV 2009: 216-221 - Alexander Buslaev, N. J. Wang, J. M. Guo, Marina V. Yashina:
On Recovery of Plane Object Shape by Projections. IPCV 2009: 222-226 - Juan Li, Chunfu Shao, Xuan Zhang:
Pedestrian Detection & Tracking from a Moving Vehicle. IPCV 2009: 227-232 - Aydin Akyol, Muhittin Gökmen:
An Efficient Subspace Representation For Super-Resolution Problem. IPCV 2009: 233-242
Databases + Indexing + Data Hiding + Image Copyright + Wavelets
- Yonghui Wang, Suxia Cui, Jian-ao Lian, Yonggao Yang, Cajetan M. Akujuobi:
Image Completion in Redundant Wavelet Domain. IPCV 2009: 243-247 - William Plant, Gerald Schaefer:
Evaluation and Benchmarking of Image Database Navigation Tools. IPCV 2009: 248-254 - Narek Zohrabyan, Jane Dong:
Content Adaptive Error Concealment for Packetized Zero-tree Wavelet Coded Images over Lossy Networks. IPCV 2009: 255-260 - Hassan Zandi, Amir Reza Jalilian, Asieh Tavakol, Behbod Maashkar, Babak Ebrahimi, Morteza Ebrahimi Ghareveran, Ahmad Reza Farzin, Mostafa Aghabozorgi:
Dual-Head SPECT System in Coincidence Mode (PET) Noise Reduction by Wavelet for Animal Study. IPCV 2009: 261-263 - Amrutha Varadarajan, Anthoniraj Raj:
A Block Based Robust Watermarking Scheme for Information Security. IPCV 2009: 264-269 - Jyoti Manoorkar:
Color Histograms for Content-Based Image Retrieval. IPCV 2009: 270-274 - Shih-Chieh Shie, Long-Tai Chen:
A VQ-Based Image Steganographic Scheme with High Visual Quality of Images. IPCV 2009: 275-280 - Soheila Kiani, Mohsen Ebrahimi Moghaddam:
Fragile Image Watermarking Using Fractal Block Coding. IPCV 2009: 281-286 - Rakhi C. Motwani, Frederick C. Harris Jr.:
Robust 3D Watermarking Using Vertex Smoothness Measure. IPCV 2009: 287-293 - Lei Sun, Jianshu Luo:
Symmetric Extension at Image Boundaries of Quincunx Wavelet Transform. IPCV 2009: 294-299 - Baiqiao Deng:
Three-Coefficient Scaling Functions and Biorthogonal Wavelets. IPCV 2009: 300-306 - Sai Shyam Sharma, Venkatachalam Chandrasekaran:
Embedding Large Watermarks In Images Using Discrete Fractional Cosine Transform. IPCV 2009: 307-313 - William G. Wee, Songbo Wu:
A New Wavelet Based Image Denoising Method. IPCV 2009: 314-320 - Mukesh C. Motwani, Frederick C. Harris Jr.:
Fuzzy Perceptual Watermarking For Ownership Verification. IPCV 2009: 321-325 - Wafa Maghrebi, Mohamed A. Khabou, Adel M. Alimi:
Extraction of Fuzzy Spatial Relationships for Multi Objects Indexing of Historic Mosaic Images. IPCV 2009: 326-330 - Charlie Obimbo:
A Watermark Generation Algorithm Using The Mersenne Twister. IPCV 2009: 331-336 - Xiao Nian Tang, Ke Wang, Gui Jun Nian, Dan Wang, Na Ni:
Analysis and Realization of Data Hiding in Single Layer of BOR Multiwavelet Domain. IPCV 2009: 337-342 - Bilal Zaidan, Aws Zaidan, Fazida Othman, R. Z. Raji, Saad Mohammed, Mohamed Abdulrazzaq:
Quality of Image vs. Quantity of Data Hidden in the Image. IPCV 2009: 343-350
Face Recognition, Detection, Face Features and Related Issues
- Mouncef Lahlou, Malek Adjouadi, Armando Barreto:
A Robust Face Detection Method Using Intrinsic Images and an Energy Minimization Technique under the Near-IR light Spectrum. IPCV 2009: 351-356 - Hima Vadapalli, Henry O. Nyongesa, Christian W. Omlin:
Facial Action Unit Recognition Using Recurrent Neural Networks. IPCV 2009: 357-361 - Seok-Min Chae, Jong-won Lee, Su-Young Ha, Young-Choon Kim, Sang-Ho Ahn, Kyu-Ik Sohng:
An Occupant Sensing System Using Single Video Camera and Ultra-sonic Sensor for Advanced Airbag. IPCV 2009: 362-366 - Sakthivel Subramaniam, R. Lakshmipathi, M. A. Manikandan Arumugam:
Evaluation of Feature Extraction and Dimensionality Reduction Algorithms for Face Recognition Using ORL Database. IPCV 2009: 367-373 - Jin Wang, Malek Adjouadi:
Modified Fast Principal Component Analysis. IPCV 2009: 374-377 - Ammar Shihab:
Face Recognition Using LDA And PCA By Multi Edge Block Image. IPCV 2009: 378-386 - Krissada Asavaskulkeit, Somchai Jitapunkul:
Performance Evaluation of Color Face Hallucination with a Linear Regression Model in MPCA. IPCV 2009: 387-392 - Ananthashayana Vellore Krishnamurthy, Jyothirmayi Mysore, Pushpa Mysore Krishna:
Real Time Face Recognition Using Single Face per Person Database. IPCV 2009: 393-398 - Cesar A. Uribe, Claudia Isaza:
Integration Methodology of Face Detection and Speech Recognition. IPCV 2009: 399-405 - Quoc Dinh Nguyen, Maurice Milgram:
Error Correction in Incremental Learning For Lip Tracking. IPCV 2009: 406-412
Video + Multimedia
- Salman Aslam, Aaron F. Bobick, Christopher F. Barnes:
Compensation Methods Using Signal Processing and Adaptive Quantization for Better Meamn Shift Tracking on Compressed Video. IPCV 2009: 413-419 - Yong Wei, Suchendra M. Bhandarkar, Xiuping Tao, Junfeng Qu:
Heterogeneous Video Personalization Aggregation. IPCV 2009: 420-426 - Hisham Sliman, Mohamed El-Sharkawy, Maher E. Rizkalla, Paul Salama, Salwa El-Ramly:
Improving VC-1 In-Loop Deblocking Filter. IPCV 2009: 427-432 - Marek Domanski, Mateusz Gotfryd, Piotr Wegner:
View Synthesis for Multiview Video Transmission. IPCV 2009: 433-439 - Ehsan Adeli-Mosabbeb, Houman Abbasian, Mahmood Fathy:
Clustering Based Non-parametric Model for Shadow Detection in Video Sequences. IPCV 2009: 440-445 - Syed Sohail Ahmed, Waleed Ejaz:
An Efficient Embedded Software Architecture for Real-time video Applications. IPCV 2009: 446-450 - Ali Amiri, Mahmood Fathy:
Video Retrieval Using Generalized Eigenvalue Decomposition. IPCV 2009: 451-455 - Mahmood Amintoosi, Mahmood Fathy, Nasser Mozayani:
Video Resolution Enhancement in the Presence of Moving Objects. IPCV 2009: 456-460 - Youness Tabii, Rachid Oulad Haj Thami:
An Efficient and Simple Framework for Soccer Video Summaries and Highlights Extraction. IPCV 2009: 461-465 - Jaroslaw Marek, Marek Domanski:
Direct Transcoding of AVC/H.264 Bitstreams for Bitrate Reduction with Minimized Video Quality Losses. IPCV 2009: 466-469 - Nourhan El Beheiry, Mohamed El-Sharkawy, Mona Lotfy, Said Elnoubi:
A Modified Fast and Efficient Spatial Error Concealment Technique for Block-Based Video Coding Systems. IPCV 2009: 470-478
Surveillance + Biometrics + Inspection
- Xianping Fu, Gang Luo, Eli Peli:
Tracking Telescope Aiming Point for Bioptic Driving Surveillance. IPCV 2009: 479-484 - Joshua Alewo Atah, Gareth Howells:
Integrating Revocable Biometrics Within a Voice Based Template-Free Biometric Security System. IPCV 2009: 485-491 - Moorim Kim, Yunyoung Nam, Suckchul Kim, Weduke Cho:
A Hardhat Detection System for Preventing Work Zone Accidents in Complex Scene Images. IPCV 2009: 492-500
Compression Methods
- Anthony Schmieder, Howard Cheng, Xiaobo Li:
A Study of Clustering Algorithms and Validity for Lossy Image Set Compression. IPCV 2009: 501-506 - Michael Bank:
Perception Redundancy Theory and Technical Compression Systems. IPCV 2009: 507-514 - Denis Spelic, Borut Zalik:
Determination of Prediction Functions for Lossless Image Compression Using Genetic Algorithm. IPCV 2009: 515-518 - Daniel Burfoot, Yasuo Kuniyoshi:
Compression Rate Methodology for Pure Empirical Vision Science. IPCV 2009: 519-525 - Mahbub Murshed, Md. Hasanul Kabir, Oksam Chae:
A Quadratic Bitplane Block Similarity (QBPS) Approach for Lossless Image Compression. IPCV 2009: 526-531 - Somasundaram Karuppanagounder, Mary Shanthi Rani Marcelin Franklin:
Adaptive Classified Pattern Matching Vector Quantization Algorithm for Compressing Images. IPCV 2009: 532-540
Segmentation + Feature Extraction + Registration + Classification + Edge Detection
- Rita Kovordányi, Chandan Roy, Mohammad Saifullah:
Local Feature Extraction - What Receptive Field Size Should Be Used? IPCV 2009: 541-546 - Yu Chen, Malek Adjouadi:
A New Noise Tolerant Segmentation Approach to Nonideal Iris Image with Optimized Computational Speed. IPCV 2009: 547-553 - Yan Nei Law, Hwee Kuan Lee, Andy M. Yip:
Supervised Texture Segmentation Using the Subspace Mumford-Shah Model. IPCV 2009: 554-560 - Mayank Vatsa, Richa Singh, Afzel Noore:
Denoising and Segmentation of 3D Brain Images. IPCV 2009: 561-567 - Yan Nei Law, Hwee Kuan Lee, Chaoqiang Liu, Andy M. Yip:
Segmentation of Semi-transparent Objects Using a Variant of the Mumford-Shah Model. IPCV 2009: 568-574 - Engin Mendi, Mariofanna G. Milanova:
Quasi-Newton Minimization for Active Contours with Chan-Vese Model. IPCV 2009: 575-578 - Xiali Wang, Yun Lei:
An Approach of Traffic Object Classification Based on Improved Support Vector Machine. IPCV 2009: 579-584 - Kaustubh Bhattacharyya, Kandarpa Kumar Sarma:
Innovative Segmentation of Handwritten Text in Assamese Using Neural Network. IPCV 2009: 585-590 - Guillermo Palacios, José Ramón Beltrán, Raquel Lacuesta Gilaberte:
Automatic Breast Tumor Detection Using Cellular Characteristics, Multi-Resolution Analysis And Neural Networks. IPCV 2009: 591-596 - Somasundaram Karuppanagounder, Kalaiselvi Thiruvenkadam:
A Comparative Study of Segmentation Techniques used for MR Brain Images. IPCV 2009: 597-603 - Chang Kim, Amar Raheja, David Still:
Automated Seed Counting Algorithm. IPCV 2009: 604-608 - Talha Jamal Ahmad, Hussnain Ali, Shoab A. Khan:
Classification of Phonocardiogram Using an adaptive Fuzzy Inference System. IPCV 2009: 609-614 - Mohamed Ben Hadj Rhouma, Lotfi Hermi, Mohamed A. Khabou:
Laplacian and Bilaplacian Based Features for Shape Classification. IPCV 2009: 615-619 - Peter Saveliev:
Topology Based Method of Segmentation of Gray Scale Images. IPCV 2009: 620-626 - Hye-Youn Lim, Dae-Seong Kang:
A Study of Efficient Background Extraction for Moving Objects Detection in an Outdoor Environment. IPCV 2009: 627-631 - J. H. Park, G. S. Lee, S. H. Kim, J. S. Lim, S. Y. Park, W. H. Cho:
Integrated Registration Based on Statistical Modeling for Medical Volume Images and its Visualization. IPCV 2009: 632-637 - Anupama Krishnan, Chris Lewis, Dwight Day:
Vision Based Inventory System for Cataloguing Road Signs. IPCV 2009: 638-643 - M. C. Jobin Christ, G. Jagan, R. M. S. Parwathi:
Topological Constraints in Segmentation of MRI Brain Images. IPCV 2009: 644-650 - Jale Bektas, Turgay Ibrikci:
Using Threshold Techniques with K-Means for MRI Segmentation. IPCV 2009: 651-655 - Vladimir Volkov:
Segmentation and Extraction of Extensive Objects on Digital Images. IPCV 2009: 656-664
Recognition Techniques
- Juan P. Wachs, Deborah Goshorn, Mathias Kölsch:
Recognizing Human Postures and Poses in Monocular Still Images. IPCV 2009: 665-671 - Rhonda D. Phillips, Layne T. Watson, Randolph H. Wynne, Naren Ramakrishnan:
A Hypothesis Test for the Evaluation of Soft Clusters for Classification. IPCV 2009: 672-678 - Yousef Alotaibi, Khondaker Abdullah Al Mamun, Muhammad Ghulam:
Noise Effect on Arabic Alphadigits in Automatic Speech Recognition. IPCV 2009: 679-682 - Mohamad Adnan Al-Alaoui:
Al-Alaoui Pattern Recognition Algorithm: A MSE Asymptotic Bayesian Approach to Boosting. IPCV 2009: 683-689 - Zong Chen:
Handwritten Digits Recognition. IPCV 2009: 690-694 - Changan Han, Malek Adjouadi, Armando Barreto, Naphtali Rishe, Jean Andrian:
Improved Pyramidal Neural Network for Segmented Handwritten Characters Recognition. IPCV 2009: 695-699 - Serban Oprisescu, Constantin Burlacu, Vasile Buzuloiu, Laurentiu-Mihail Ivanovici:
Action Recognition for Simple and Complex Actions Using Time of Flight Cameras. IPCV 2009: 700-706 - Amir Hatami, Mojib Majidi, Zohre Norouzi, Dzulkifli Mohamad:
Improve Recognition-based Segmentation for printed Persian Character Recognition. IPCV 2009: 707-712 - Zong Chen:
Handgrip Recognition on Joystick. IPCV 2009: 713-717 - Sanjay Goel, Priyank Singh, Siddharth Batra, Anshul Jain:
Vehicle License Plate Identification and Recognition. IPCV 2009: 718-721 - Ivo M. Creusen, Rob G. J. Wijnhoven, Peter H. N. de With:
Applying Feature Selection Techniques for Visual Dictionary Creation in Object Classification. IPCV 2009: 722-727 - Magy Kandil, May Salama:
Optimization of ART1 Neural Networks using PSO for Fire Recognition. IPCV 2009: 728-734 - Feng Zhao, Feng Lin, Hock Soon Seah:
Binary Plankton Image Classification Using Pairwise Classifiers. IPCV 2009: 735-739 - Kiseo Park:
A Study on an Image Recognition in the Environment of Home-network. IPCV 2009: 740-745 - Chun Yuan, Shiqi Zhang, Yan Zhang:
Feature Extraction Methods for Handwritten Character Recognition Based on Acceleration. IPCV 2009: 746-753 - Xiaozhen You, Magno R. Guillen, William D. Gaillard, Malek Adjouadi:
Application of Nonlinear Classifiers with the Principal Component Analysis in fMRI Language Activation Pattern Recognition in a Multisite Study for Pediatric Epilepsy. IPCV 2009: 754-758 - Mukund Raj, Naveen Kumar, K. K. Biswas:
Real Time Hand Tracking and Gesture Recognition. IPCV 2009: 759-765 - Rhonda D. Phillips, Layne T. Watson, Randolph H. Wynne, Naren Ramakrishnan:
An Iterative Framework for the Improvement of Soft Clusters for Classificaction. IPCV 2009: 766-772 - Meryem Erbilek, Önsen Toygar:
Robustness of Subpattern-Based Approaches to Occlusions on Iris Images. IPCV 2009: 773-778 - Marwa Abdelmonem, Mohammad Hamdy El-Hoseiny, Asmaa Ali, Karim Emara, Habiba Abdel Hafez, Asmaa Gamal:
Dynamic Optical Braille Recognition (OBR) System. IPCV 2009: 779-786
Motion and Orientation Estimation + Target/Object Tracking
- Bo Yang, Mo Dai:
Hermite Transform Based Orientation Estimation In Directional Texture. IPCV 2009: 787-792 - Jong-Ho Yun, Seung-Jun Lee, Hwa-Hyun Cho, Myung-Ryul Choi:
A Motion Estimation Algorithm Using Adaptive Extension Block Based on the Frame Difference Map. IPCV 2009: 793-797 - Yoo-Kyung Lee, Jin-Keun Seok, Sung-Hak Lee, In-Ho Song, Kyu-Ik Sohng:
Improvement of LCD motion blur in MPEG Domain. IPCV 2009: 798-801 - Volodymyr Moroz, Viktor Zaharov:
Temporal Video Sequence Interpolation Based on Motion Compensation in Wavelet Domain. IPCV 2009: 802-806 - Yasser Almehio, Samia Bouchafa:
Efficient Affine Motion Estimation Using Level-Lines Grouping. IPCV 2009: 807-813