ESTIMATING THE SIZE AND PROFILE OF DIFFUSE DYE CLOUDS IN COLOR NEGATIVE FILM

Using a simple analysis technique applied to photomicrographic darn, t he size and profile of highly, diffuse dye cloud structures in a colou r negative photographic material have been determined. The size and pr ofile of individual clouds were also calculated from modulation transf er function (MTF) and noise power spectrum (NPS) measurements. In the ease of NPS, modifications to an existing theory had to be made in ord er to allow for the kinds of cloud structure encountered with extreme levels of dye diffusion. The results obtained from MTF, NPS and photom icrographic data were found to correlate reasonably well.