Measurements of the modulation transfer function of image displays

Triantaphillidou, S. and Jacobson, R.E. 2004. Measurements of the modulation transfer function of image displays. Journal of Imaging Science and Technology. 48 (1), pp. 58-65.

TitleMeasurements of the modulation transfer function of image displays
AuthorsTriantaphillidou, S. and Jacobson, R.E.
Abstract

Measurements of the Modulation Transfer Function (MTF) of image displays are often required for objective image quality assessments, but are difficult to carry out due to the need for specialized apparatus. This article presents a simple method for the measurement of the MTF of a sample CRT display system which involves the use of a still digital camera for the acquisition of displayed test targets. Measurements are carried out using, first, the sine wave method, where a number of artificial sine wave images of discrete spatial frequency and constant modulation are captured from a close distance. Fourier techniques are employed to extract the amplitude of the display signal from the resulting macroimages. In a second phase, displayed artificial step edges are captured, and the ISO 12333 SFR (Spatial Frequency Response) Slanted Edge plug-in is used for automatic edge analysis. The display MTF, in both cases, is cascaded from the closed-loop system MTF. The two measuring techniques produced matching results, indicating that under controlled test conditions accurate measurements of the display MTF can be achieved with the use of relatively simple equipment.

JournalJournal of Imaging Science and Technology
Journal citation48 (1), pp. 58-65
ISSN1062-3701
YearJan 2004
Web address (URL)http://www.imaging.org/store/epub.cfm?abstrid=30163
Publication dates
PublishedJan 2004
File

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