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Bradford University Research Group

Dr. Stan Ipson




Current Research Activities

Watermarking digital images: The work is concerned with developing new secure, robust and imperceptible watermarks which are compatible with the latest JPEG 2000 compression technology. Using a combination of parameterised discrete wavelet transforms, feature based segmentation and human visual response related watermark embedding, a new system has been developed with characteristics superior to published alternatives. Watermarks created by the systems cannot be removed without secret keys, are imperceptible and can still be detected after images have been subjected to lossy compression, and geometrical transformations including scaling, rotation and cropping.

Feature recognition in solar images: The work, which has just started, is part of a three year European funded multinational project to set up a European Grid of Solar Observations. This will allow users of the grid database to automatically extract those images which are relevant to their work from a wide range of existing databases all with different standards. The work at Bradford, in collaboration with the Meudon Observatory in Paris, is concerned with developing highly reliable and efficient techniques for the automatic identification and extraction of features in solar images.

3-D reconstruction of scenes using uncalibrated images: The work is concerned with developing new reliable techniques for generating 3-D models of general scenes. Starting from a pair of arbitrary images of a scene and with no other information, an initial set of correspondences is found from and a pseudo-stereo pair of images obtained. Viewing the pseudo-stereo pair as an anaglyph, the 3-D scene can be visualised in great detail. Using techniques developed within an earlier project, pseudo-stereo pairs optimised for different parts of the scene can be generated to enable the production of a dense disparity maps using correlation techniques. Different techniques are being developed to convert these disparity maps into 3-D maps according to the amount of calibration information that is available.

Recent publications

Journal thesis and book publications

  • Melhi, M., 'Off-line Arabic cursive handwriting recognition using artificial neural networks' PhD thesis, University of Bradford, 2001
  • Benkhalil, A. 'An FPGA based real-time autonomous video surveillance system' PhD thesis, University of Bradford, 2001
  • Al-Shalfan, K., 'Investigation of 3-D reconstruction from uncalibrated images' PhD thesis, University of Bradford, 2001
  • Ipson, S. S. 'Light Detection, Image, and Vision Systems' The Mechatronics Handbook, CRC Press LLC, ISBN 0-8493-0066-5, 2002, pp. 19.119 - 19.136.
  • Ipson, S. S. and Okereke O. C.' Vision and image sensors' The Measurement, Instrumentation and Sensors Handbook, Ed. John G Webster, CRC and IEEE Press, 1999, pp. 64-1 - 64-19.
  • Al-Shalfan, K. A., Haigh J. G. and Ipson S. S. 'A direct algorithm for rectifying pairs of uncalibrated images' IEE Electronics Letters, Vol. 36, No 5, 2000, pp. 419 - 420.
  • Benkhalil, A., Ipson S. and Booth W. 'A Real-Time Video Surveillance System Using a Field Programmable Gate Array' International Journal of Imaging Systems and Technology, Vol 11, No 2, 2000, pp. 130-137.
  • Melhi, M., Ipson S.S. and Booth W. 'A novel triangulation procedure for thinning hand-written text' Pattern Recognition Letters 22,2001, pp. 1059 - 1071.
  • Melhi, M., Ipson S.S. and Booth W. 'A database for research in Arabic handwriting recognition'
    Journal of Science and Technology, Vol. 6 No.1, 2001, pp. 1-8.

Conference publications

  • Suhail. M., Niazy I. and Ipson S. S. 'Multimedia Copyright Protection' Proceedings of 7th Annual IEEE Technical Exchange Meeting, KFUPM Dhahran Saudi Arabia, April 18 - 19 2000, pp. 215-220.
  • Benkhalil. A. Ipson S. and Booth W. 'New Generation Video Surveillance System Based on Image Processing and FPGA Processor' Signal/Image Processing and Pattern Recognition, Proceedings of the Fifth All-Ukranian International Conference UkrOBRAZ'2000 Nov 27 - Dec 1 2000
  • Suhail. M., Ipson, S., Sadoun, B., Al-Balqa A, Obaidat M. 'Simulation Study of Digital Watermarking in JPEG andJPEG 2000 Schemes' Computer Simulation Conference, Orlando, Florida, 19 July 2001.
  • Al-Shalfan, K. A., Ipson S. S. and Haigh J. G. B. 'Distinguishing real and virtual edge intersections in pairs of uncalibrated images' Proceedings of the IASTED International Conference Internet and Multimedia Systems and Applications, Las Vegas, Nevada, USA, November 19-23, 2000, pp. 16-26.


Page last updated: 8 March, 2004

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