Contrast enhancement and small detail blending of photographic i

Details Contrast enhancement and small detail blending of photographic i Contrast enhancement and small detail blending of photographic i

1976-04-15

1978-06-06

Martin, Jr., Roland E.

Gas separation: apparatus

Electric field separation apparatus

With means to add charged solid or liquid particles to...

96 44, 350314, G03C 504

Patent

active

040934608

ABSTRACT:
A method and apparatus for improving the quality of photographic images by projection through a linear radial transmission filter. The invention yields small detail blending or contrast enhancement of small details with a minimum loss of sharpness. A simple enlarger and a linear radial transmission filter are used to process a wide variety of images and are capable of simple adjustment to vary the resulting degree of blending or enhancement.

REFERENCES:
patent: 1990396 (1935-02-01), Ballard
patent: 2363689 (1944-11-01), Rackett
patent: 2755402 (1956-07-01), Morrell
patent: 3253918 (1966-05-01), Condax
patent: 3411905 (1968-11-01), Mooney et al.
patent: 3615433 (1971-10-01), Biernson
patent: 3817748 (1974-06-01), Whittaker
patent: 3834905 (1974-09-01), Dodd et al.

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