Image input/output apparatus

Optical: systems and elements – Diffraction – Using fourier transform spatial filtering

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Details

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.

REFERENCES:
patent: 4462046 (1984-07-01), Spight
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.

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