Dr. Changsong Liu Profile

Dr. Changsong Liu

at Tsinghua Univ

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Author

Publications (22)

Proceedings Article | 6 March 2015 Paper

A scheme for automatic text rectification in real scene images

Baokang Wang, Changsong Liu, Xiaoqing Ding

Proceedings Volume 9408, 94080M (2015) https://doi.org/10.1117/12.2083184

KEYWORDS: Image segmentation, Distortion, Virtual point source, Lithium, Optical character recognition, Detection and tracking algorithms, Cameras, Inspection, Feature extraction, Imaging systems

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Proceedings Article | 27 February 2015 Paper

Still-to-video face recognition in unconstrained environments

Haoyu Wang, Changsong Liu, Xiaoqing Ding

Proceedings Volume 9405, 94050O (2015) https://doi.org/10.1117/12.2082990

KEYWORDS: Video, Video surveillance, Facial recognition systems, Video compression, Image resolution, Detection and tracking algorithms, Light sources and illumination, Digital cameras, Associative arrays, Intelligence systems

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Proceedings Article | 24 March 2014 Paper

On-line signature verification method by Laplacian spectral analysis and dynamic time warping

Changting Li, Liangrui Peng, Changsong Liu, Xiaoqing Ding

Proceedings Volume 9021, 90210S (2014) https://doi.org/10.1117/12.2042472

KEYWORDS: Cell phones, Detection and tracking algorithms, Scalable video coding, Information science, Information technology, Databases, Algorithm development, Neodymium, Boron, Lithium

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Proceedings Article | 21 March 2013 Paper

A research on Video text tracking and recognition

Baokang Wang, Changsong Liu, Xiaoqing Ding

Proceedings Volume 8664, 86640G (2013) https://doi.org/10.1117/12.2009441

KEYWORDS: Video, Semantic video, Video processing, Optical character recognition, Detection and tracking algorithms, Binary data, Intelligence systems, Analytical research, Motion models, 3D modeling

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Proceedings Article | 21 February 2012 Paper

Document image orientation based on both text and image

Yuejia Sun, Changsong Liu, Xiaoqing Ding, Zhigang Fan, Francis Tse

Proceedings Volume 8302, 83020U (2012) https://doi.org/10.1117/12.912984

KEYWORDS: Optical character recognition, Image segmentation, Detection and tracking algorithms, Image analysis, Curium, Feature extraction, Statistical analysis, Intelligence systems, Color vision, Image processing

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Proceedings Article | 24 January 2012 Paper

Post processing for offline Chinese handwritten character string recognition

YanWei Wang, XiaoQing Ding, ChangSong Liu

Proceedings Volume 8297, 829709 (2012) https://doi.org/10.1117/12.905985

KEYWORDS: Optical character recognition, Image segmentation, Error analysis, Pattern recognition, Intelligence systems, Gadolinium, Information science, Information technology, Electronics engineering, Data processing

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Proceedings Article | 7 February 2011 Paper

Automatic picture orientation detection based on classifier combination

Yuejia Sun, Changsong Liu, Xiaoqing Ding, Zhigang Fan, Francis Tse

Proceedings Volume 7879, 78790C (2011) https://doi.org/10.1117/12.880046

KEYWORDS: Curium, Feature extraction, Distance measurement, Classification systems, Printing, Simulation of CCA and DLA aggregates, Statistical analysis, Intelligence systems, Digital photography, Scanners

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Proceedings Article | 7 February 2011 Paper

Text extraction from web images

Changsong Liu, Cheng Yang, Xiaoqing Ding, Jian Fan

Proceedings Volume 7879, 78790P (2011) https://doi.org/10.1117/12.880027

KEYWORDS: Image segmentation, Optical character recognition, Image resolution, Detection and tracking algorithms, Image processing algorithms and systems, Video, Binary data, Simulation of CCA and DLA aggregates, Feature extraction, Machine learning

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Proceedings Article | 10 February 2010 Paper

New performance evaluation models for character detection in images

YanWei Wang, XiaoQing Ding, ChangSong Liu, Kongqiao Wang

Proceedings Volume 7540, 754006 (2010) https://doi.org/10.1117/12.840119

KEYWORDS: Detection and tracking algorithms, Performance modeling, Image segmentation, Visual process modeling, Optical character recognition, Data processing, Inspection, Gaussian filters, Sensors, Video

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Proceedings Article | 18 January 2010 Paper

A combined recognition system for online handwritten Pinyin input

Meng Zhu, Changsong Liu

Proceedings Volume 7534, 753411 (2010) https://doi.org/10.1117/12.840117

KEYWORDS: Optical character recognition, Statistical modeling, Feature extraction, Rule based systems, Intelligence systems, Image segmentation, Data modeling, Information science, Information technology, Electronics engineering

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Proceedings Article | 11 February 2009 Paper

Eye blink detection based on eye contour extraction

Liting Wang, Xiaoqing Ding, Chi Fang, Changsong Liu, Kongqiao Wang

Proceedings Volume 7245, 72450R (2009) https://doi.org/10.1117/12.804916

KEYWORDS: Eye, Facial recognition systems, Eye models, Lead, Detection and tracking algorithms, Databases, Video, Glasses, Statistical modeling, Machine vision

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Proceedings Article | 19 January 2009 Paper

Restoring warped document image through segmentation and full page interpolation

Yu Zhang, Changsong Liu, Xiaoqing Ding, Kongqiao Wang

Proceedings Volume 7247, 72470R (2009) https://doi.org/10.1117/12.805424

KEYWORDS: Image segmentation, Optical character recognition, Image restoration, Cameras, 3D image restoration, 3D image processing, 3D modeling, Image enhancement, Detection and tracking algorithms, Fuzzy logic

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Proceedings Article | 19 January 2009 Paper

Text line extraction in free style document

Xiaolu Shen, Changsong Liu, Xiaoqing Ding, Yanming Zou

Proceedings Volume 7247, 72470L (2009) https://doi.org/10.1117/12.805695

KEYWORDS: Data modeling, Error analysis, RGB color model, Algorithms, Statistical modeling, Statistical analysis, Intelligence systems, Distance measurement, Detection and tracking algorithms, Binary data

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Proceedings Article | 19 January 2009 Paper

Multi-font printed Mongolian document recognition system

Liangrui Peng, Changsong Liu, Xiaoqing Ding, Hua Wang, Jianming Jin

Proceedings Volume 7247, 72470J (2009) https://doi.org/10.1117/12.805864

KEYWORDS: Optical character recognition, Image segmentation, Visualization, Image quality, Error analysis, Digital libraries, Intelligence systems, Electronics engineering, Information science, Information technology

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Proceedings Article | 26 February 2008 Paper

Camera calibration and near-view vehicle speed estimation

Futang Peng, Changsong Liu, Xiaoqing Ding

Proceedings Volume 6813, 681314 (2008) https://doi.org/10.1117/12.765077

KEYWORDS: Cameras, Imaging systems, Roads, Calibration, Video, Motion models, Mathematical modeling, Motion detection, Motion estimation, Statistical modeling

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Proceedings Article | 29 January 2007 Paper

OCR result optimization based on pattern matching

Junqing Shang, Changsong Liu, Xiaoqing Ding

Proceedings Volume 6500, 650009 (2007) https://doi.org/10.1117/12.702786

KEYWORDS: Optical character recognition, Image processing, Image segmentation, Detection and tracking algorithms, Optimization (mathematics), Error analysis, Image quality, Intelligence systems, Image enhancement, Electronics engineering

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Proceedings Article | 16 January 2006 Paper

A new document authentication method by embedding deformation characters

Xianliang Wang, Xiaoqing Ding, Hailong Liu, Changsong Liu

Proceedings Volume 6067, 60670G (2006) https://doi.org/10.1117/12.642128

KEYWORDS: Forward error correction, Computer programming, Optical character recognition, Principal component analysis, Binary data, Digital watermarking, Printing, Visualization, Intelligence systems, Receivers

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Proceedings Article | 16 January 2006 Paper

JBIG2 text image compression based on OCR

Junqing Shang, Changsong Liu, Xiaoqing Ding

Proceedings Volume 6067, 60670D (2006) https://doi.org/10.1117/12.641557

KEYWORDS: Image compression, Optical character recognition, Image segmentation, Scanning probe microscopy, Computer programming, Image quality, Algorithms, Chromium, Image processing, Associative arrays

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Proceedings Article | 17 January 2005 Paper

Automatic style clustering of printed characters in form images

Changsong Liu, Xiaoqing Ding

Proceedings Volume 5676, (2005) https://doi.org/10.1117/12.588138

KEYWORDS: Optical character recognition, Error analysis, Detection and tracking algorithms, Distance measurement, Prototyping, Printing, Image classification, Machine learning, Expectation maximization algorithms, Algorithm development

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Proceedings Article | 13 January 2003 Paper

General Chinese document capture system with an improved error-rejecting module

Dahai Luan, Changsong Liu, Xiaoqing Ding

Proceedings Volume 5010, (2003) https://doi.org/10.1117/12.476037

KEYWORDS: Optical character recognition, Image processing, Error analysis, Image segmentation, Image restoration, Intelligence systems, Image classification, Data analysis, Digital libraries, Process control

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Proceedings Article | 18 December 2001 Paper

Single-character type identification

Yefeng Zheng, Changsong Liu, Xiaoqing Ding

Proceedings Volume 4670, (2001) https://doi.org/10.1117/12.450738

KEYWORDS: Optical character recognition, Feature extraction, Image quality, Error analysis, Neural networks, Electronics engineering, Fluctuations and noise, Mathematics, Sodium, Virtual colonoscopy

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Proceedings Article | 21 December 2000 Paper

Gray-scale-image-based character recognition algorithm for low-quality and low-resolution images

Xuewen Wang, Xiaoqing Ding, Changsong Liu

Proceedings Volume 4307, (2000) https://doi.org/10.1117/12.410851

KEYWORDS: Image quality, Image processing, Optical character recognition, Detection and tracking algorithms, Distortion, Binary data, Algorithm development, Point spread functions, Spatial frequencies, Principal component analysis

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Showing 5 of 22 publications

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