WestminsterResearch

An evaluation of MTF determination methods for 35mm scanners

Triantaphillidou, Sophie and Jacobson, Ralph E. and Fagard-Jenkin, Rob (1999) An evaluation of MTF determination methods for 35mm scanners. In: IS&T PICS, April 1999, Savannah, Georgia, USA.

[img]
Preview
PDF
60Kb

Abstract

Three different techniques were used to determine the Modulation Transfer Function (MTF) of a 35mm film scanner. The first involved scanning sine wave charts comprising a number of patches with different frequencies of known modulation. The second method involved the scanning and Fourier transform of a photographic grain noise pattern to simulate low modulation white noise. Finally, the ISO 12233 Slanted-edge Spatial Frequency Response (SFR) plug-in was used to determine the average MTF of the device. This creates a super-sampled edge profile from sequential scan-lines of the sampled image of an edge. Procedures for creating test targets, where appropriate, are described. Advantages and limitations encountered in applying each methodology are discussed, as well as the precision of each method for deriving the MTF. Conclusions are drawn concerning the comparability of MTFs determined by the three methods.

Item Type:Conference or Workshop Item (Paper)
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:8950
Deposited On:16 Dec 2010 13:29
Last Modified:16 Dec 2010 13:29

Repository Staff Only: item control page