Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1991-05-24
1992-06-23
Arnold, Bruce Y.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
359560, 382 42, 364822, G02B 2746, G06E 300, G06F 15336
Patent
active
051248425
ABSTRACT:
An image input/output apparatus which can reproduce an image having a large focal depth, without decreasing the resolution and luminance. The apparatus has a wide range of practical applications, and can be, easily, quickly and exactly put to practical use. The apparatus includes a mechanism for inputting a plurality of images focused on different object planes, circuitry for Fourier-transforming the images input by the inputting mechanism circuitry for weighting and adding the images Fourier-transformed by the Fourier-transforming circuitry, and circuitry for performing an inverse Fourier transform of Fourier spectrum images obtained by the weighting and adding circuitry.
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patent: 4591904 (1986-05-01), Urabe et al.
patent: 4621917 (1986-11-01), Kaneda
patent: 4661986 (1987-04-01), Adelson
patent: 4903204 (1990-02-01), Dobbins
Digital Image Processing, John Wiley & Sons, 1978, New York, New York, pp. 378-383, chapter entitled, "Algebraic Spatial Image Restoration Techniques".
Takatoshi Ota, Kokichi Sugihara, and Noboru Sugie, Journal of the Institute of Electronic and Communication Engineers (D), J66-D, 1245, (1983).
Journal of the Optical Society of America, vol. 50, No. 8, pp. 749-753, "Use of Annular Apertures to Increase Focal Depth", by W. T. Welford.
Applied Optics, vol. 24, No. 14, Jul. 1985, pp. 2076-2080, "Digital Composition of Images with Increased Depth of Focus Considering Depth Information" by Sugimoto et al.
Honda Toshio
Kikuchi Susumu
Ohyama Nagaaki
Arnold Bruce Y.
Olympus Optical Co,. Ltd.
Phan James
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