Patent ID: 6115062
Filing Date: 2000-09-05
Classification: H04N

Abstract:
A method of transferring a scene recorded on photographic negative film to video using a telecine, the method comprising the steps of:a) setting up the telecine so that predetermined waveform readings are obtained for a reference film element comprising at least one gray scale portion comprising density patches corresponding to three known density values;b) storing the telecine set-up settings;c) loading a scene on photographic negative film into the telecine wherein the scene includes a gray card;d) using the stored telecine settings to effect transfer of the scene to video;e) determining red, green and blue video voltages for the gray card; andf) converting the red, green and blue video voltages to Transfer Points between 0 and 50 to provide exposure information for the scene by referring to a look-up table derived from measuring the red, green, and blue video voltages for step sensitometric strips of negative film stock on a telecine set-up in accordance with step a), correlating the measured voltages to the sensitometric strip densities, and converting the sensitometric strip densities into Transfer Points by dividing by 0.025 and off-setting the obtained values to obtain twenty-five Transfer Points for the laboratory aim density values corresponding to normal exposure of an 18% gray card.