Abstract

Recently, Bryngdahl obtained negative images from carrier-frequency photographs by reversing the modulation before recording. This paper discusses the role of the D–logE curve of photographic film in carrier-frequency photography and shows that positive and negative tone reproduction are obtained from the proportionality of the image luminance to the film characteristic α²(E), the derivative of amplitude transmittance with respect to the logarithm of exposure. An experiment suggests that reversal of tone reproduction might be of use for gray-scale compression.

© 1971 Optical Society of America

Image-Transfer Characteristics of Carrier-Frequency Photography*

Olof Bryngdahl
J. Opt. Soc. Am. 62(6) 807-813 (1972)

Criterion for Tone Reproduction

C. J. Bartleson
J. Opt. Soc. Am. 58(7) 992-995 (1968)

Optical Imaging with Frequency-Dependent Spectral-Density Functions

George Jan and Harold Mendlowitz
J. Opt. Soc. Am. 61(7) 865-869 (1971)

Random-carrier photography

Olof Bryngdahl
J. Opt. Soc. Am. 63(9) 1064-1070 (1973)

Noise Characteristics of Photographic Emulsions Used for Holography

Wai–Hon Lee and Milton O. Greer
J. Opt. Soc. Am. 61(3) 402-409 (1971)