Michael, I’m not able to address your questions tonight to the degree in which I’d like, so this should get you started. Pretty much everything you want to know is in these two papers. Nelson and Simonds' Simple Methods for Approximating the Fractional Gradient Speeds of Photographic Materials (which is too big to upload. Contact me and I'll email it to you.) and my Delta-X Criterion (which can be uploaded).
Last edited by Stephen Benskin; 02-27-2013 at 10:40 PM. Click to view previous post history.