caa a22 4500 477123910 CHVBK 20180405111644.0 cr unu---uuuuu 170330e19970301xx s 000 0 eng 10.1007/BF02677995 doi (NATIONALLICENCE)springer-10.1007/BF02677995 A parallel implementation of a modified Richardson-Lucy algorithm for image de-blurring [Elektronische Daten] [A. Al-Bakkar, S. Ipson, G. Porter, D. Gleed] Passive imaging in the millimetre wave region of the spectrum is attractive compared with imaging in the visible and infrared because of its better penetration through cloud and rain. However, the diffraction limited spatial resolution is far worse and computer restoration of millimetre wave images is necessary. The Richardson-Lucy algorithm is frequently used for image restoration because compared with linear algorithms it has reduced sensitivity to error in a priori knowledge, and fewer restoration artefacts. However, it requires many iterations to converge and is very slow compared with linear methods. This paper investigates modifications of the Richardson-Lucy algorithm which speed up the execution of the algorthm. Software techniques investigated include incorporating a speedup parameter, using dual point spread functions and implementation in the Fourier domain. A parallel implementation of the algorithm has also been investigated using a tree topology network of between 1 and 10 transputers. Finally an application of the transputer system to the de-blurring of a millimetre-wave image obtained from a mechanical scanning system is described in the paper. Plenum Publishing Corporation, 1997 Al-Bakkar A. Department of Electronic and Electrical Engineering, University of Bradford, BD7 1DP, Bradford, United Kingdom aut Ipson S. Department of Electronic and Electrical Engineering, University of Bradford, BD7 1DP, Bradford, United Kingdom aut Porter G. Pace (Europe) Ltd, Victoria Road, BD18 3LF, Shipley, United Kingdom aut Gleed D. Defence Research Agency, St. Andrews Road, WR14 3PS, Great Malvern, United Kingdom aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/3(1997-03-01), 555-575 0195-9271 18:3<555 1997 18 10762 https://doi.org/10.1007/BF02677995 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02677995 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Al-Bakkar A. Department of Electronic and Electrical Engineering, University of Bradford, BD7 1DP, Bradford, United Kingdom aut NATIONALLICENCE 700 1- Ipson S. Department of Electronic and Electrical Engineering, University of Bradford, BD7 1DP, Bradford, United Kingdom aut NATIONALLICENCE 700 1- Porter G. Pace (Europe) Ltd, Victoria Road, BD18 3LF, Shipley, United Kingdom aut NATIONALLICENCE 700 1- Gleed D. Defence Research Agency, St. Andrews Road, WR14 3PS, Great Malvern, United Kingdom aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/3(1997-03-01), 555-575 0195-9271 18:3<555 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer