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
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.
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,
- Al-Shalfan, K., 'Investigation of 3-D reconstruction
from uncalibrated images' PhD thesis, University of Bradford,
- 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.
- 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,
- 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.