Digitization of film for archiving through the estimation of dye densities

Lon N. Pringle; Thomas P. McElwain; Bruce B. Glasgow

doi:10.1117/12.207597

27 April 1995 Digitization of film for archiving through the estimation of dye densities

Lon N. Pringle, Thomas P. McElwain, Bruce B. Glasgow

Proceedings Volume 2413, Color Hard Copy and Graphic Arts IV; (1995) https://doi.org/10.1117/12.207597
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

This paper introduces an alternate standard for film archiving based on digitizing the dye densities of the film rather than the color (XYZ or RGB). The color of the film is encoded by the storage of two types of information: (1) the analytical densities of the dyes, which must only be stored once for each film; and (2) the dye concentrations for each pixel of each frame. If the analytical densities of the dyes are known, then the concentration of each dye can be estimated by measuring the logarithm of the transmission of the film in as few as three frequency bands. A formalism for accomplishing this estimation, as well as the estimation of the dye density curves, will be presented. The error of this digitization technique as a function of filter bandwidth and a function of the number of spectra transmission measurements used for the dye concentration estimation will be quantified. In addition, the impact of this technique for film restoration will be discussed.

Citation Download Citation

Lon N. Pringle, Thomas P. McElwain, and Bruce B. Glasgow "Digitization of film for archiving through the estimation of dye densities", Proc. SPIE 2413, Color Hard Copy and Graphic Arts IV, (27 April 1995); https://doi.org/10.1117/12.207597

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available