Patent ID: 8810645
Filing Date: 2014-08-19
Classification: H04N

Abstract:
1. A method for calibrating a production film scanner, the method comprising: providing at least one first calibration frame on an intermediate film stock, the at least one first calibration frame includes a plurality of color patches covering the full dynamic range of the intermediate film stock, each of the plurality of color patches is a different shade of grey; providing at least one second calibration frame, each one of the at least one second calibration frame including a plurality of color patches exposed on a negative film stock; scanning the at least one first and second calibration frames with a reference film scanner; analyzing the at least one first calibration frame scanned with the reference film scanner to calibrate the reference film scanner; determining a first set of target aim values for each of the plurality of color patches for the at least one second calibration frame scanned with the reference film scanner; scanning the at least one first and second calibration frames with a production film scanner; analyzing the at least one first calibration frame scanned with the production film scanner to calibrate the production film scanner for the intermediate film stock; determining a second set of target aim values for each of the plurality of color patches for the at least one second calibration frame scanned with the production film scanner; and determining a compensation calibration color lookup table for the production film scanner from the first set of target aim values determined from the scanning with the reference film scanner and the second set of target aim values determined from the scanning with the production film scanner.