Fundamentals of digital image processing
Fundamentals of digital image processing
A survey of image registration techniques
ACM Computing Surveys (CSUR)
Numerical recipes in C (2nd ed.): the art of scientific computing
Numerical recipes in C (2nd ed.): the art of scientific computing
Digital video processing
Page segmentation and classification using fast feature extraction and connectivity analysis
ICDAR '95 Proceedings of the Third International Conference on Document Analysis and Recognition (Volume 2) - Volume 2
Handbook of Image and Video Processing (Communications, Networking and Multimedia)
Handbook of Image and Video Processing (Communications, Networking and Multimedia)
New autofocusing technique using the frequency selective weighted median filter for video cameras
IEEE Transactions on Consumer Electronics
An FFT-based technique for translation, rotation, and scale-invariant image registration
IEEE Transactions on Image Processing
Progress in Camera-Based Document Image Analysis
ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 1
Improved Text-Detection Methods for a Camera-based Text Reading System for Blind Persons
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
Intelligent Document Scanning with Active Camera
ICDAR '05 Proceedings of the Eighth International Conference on Document Analysis and Recognition
3D Structure Recovery and Unwarping of Surfaces Applicable to Planes
International Journal of Computer Vision
Color targets: fiducials to help visually impaired people find their way by camera phone
Journal on Image and Video Processing
Mosaicing-by-recognition for video-based text recognition
Pattern Recognition
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
Markov random field based binarization for hand-held devices captured document images
Proceedings of the Seventh Indian Conference on Computer Vision, Graphics and Image Processing
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We describe the development of an interface to textual information for the visually impaired that uses video, image processing, optical-character-recognition (OCR) and text-to-speech(TTS). The video provides a sequence of low resolution images in which text must be detected, rectified and converted into high resolution rectangular blocks that are capable of being analyzed via off-the-shelf OCR. To achieve this, various problems related to feature detection, mosaicing, auto-focus, zoom, and systems integration were solved in the development of the system, and these are described.