Progress report on archival storage of color films utilizing a white-light processing technique

Abstract

The authors report a spatial encoding technique such that the moire fringe pattern inherently existing with the retrieved image can be avoided. To improve the diffraction efficiency of the film, they have introduced a bleaching process so that the step of obtaining a positive encoded transparency can be eliminated. Instead of restricting the encoding processing to the linear region of the T-E curve, they allow encoding in the linear region of the D-E curve, so that a broader range of encoding exposure can be utilized. Experimental results indicate that excellent color fidelity, high signal to noise ratio, and good resolution of the reproduced color images can be obtained.