MATLAB script for estimation of film/developer combination development times based on given combination samples.
Using given temperature and sensitivities, this script approximates the function time(sensitivity) using logarithmic fitting by finding optimum values alpha and beta such that
time(sensitivity) = sensitivity^alpha + 10^beta
An example result of Tri-X 400 in Xtol. The algorithm determined t(asa) = asa^0.20537 + 10^0.44103 for Xtol 1+1, which results in a development time of 6:10 for 400 ASA target sensitivity, 6:42 for 800 ASA etc.
Copyright © 2013-2014 Markus Mayer
Film Developer Parameter Estimation is licensed under the EUPL, Version 1.1 or - as soon they will be approved by the European Commission - subsequent versions of the EUPL (the "Licence"); you may not use this work except in compliance with the Licence. You may obtain a copy of the Licence at:
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