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“An Investigation into an a Posteriori Method of Image Restoration”
by John Baird Morton
April 1978
Two algorithms are developed which address the problem of estimating the magnitude and phase of the optical transfer function associated with a blurred image. The primary focus of the research is on the estimate of the phase of the optical transfer function. With the sharpening of one approximation, the method affords a reasonable estimate of the phase of the optical transfer function. Once an estimate of the optical transfer function has been made, the corresponding blurred image is Wiener filtered to estimate the original unblurred image. Results are demonstrated on computer simulated blurs and also on real world blurred imagery. Included is a mathematical bound on the phase of the optical transfer function.