Issue No. 04 - April (1985 vol. 7)
Roland T. Chin , Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706.
Chia-Lung Yeh , Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI; Eastman Kodak Research Laboratories, Rochester, NY 14650.
William S. Olson , Department of Meteorology, University of Wisconsin-Madison, Madison, WI 53706.
A constrained iterative image restoration method is applied to multichannel diffraction-limited imagery. This method is based on the Gerchberg-Papoulis algorithm utilizing incomplete information and partial constraints. The procedure is described using the orthogonal projection operators which project onto two prescribed subspaces iteratively. Its properties and limitations are presented. The effect of noise was investigated and a better understanding of the performance of the algorithm with noisy data has been achieved. The restoration scheme with the selection of appropriate constraints was applied to a practical problem. The 6.6, 10.7, 18, and 21 GHz satellite images obtained by the scanning multichannel microwave radiometer (SMMR), each having different spatial resolution, were restored to a common, high resolution (that of the 37 GHz channels) to demonstrate the effectiveness of the method. Both simulated data and real data were used in this study. The restored multichannel images may be utilized to retrieve rainfall distributions.
W. S. Olson, C. Yeh and R. T. Chin, "Restoration of Multichannel Microwave Radiometric Images," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 7, no. , pp. 475-484, 1985.