Browse > Article
http://dx.doi.org/10.3807/KJOP.2022.33.6.310

Study of MTF Measure That Adopts a Fitting Curve for the Variable Angle of a Slant Target in Presampled MTF  

Choi, Siyoun (LIG Nex1 Co., Ltd.)
Kim, Junghwan (LIG Nex1 Co., Ltd.)
Kong, Hyunbae (LIG Nex1 Co., Ltd.)
Kim, Donghwan (LIG Nex1 Co., Ltd.)
Baek, Kyounghoon (LIG Nex1 Co., Ltd.)
Park, Ingu (LIG Nex1 Co., Ltd.)
Jeon, Hyowon (LIG Nex1 Co., Ltd.)
Lee, Kinam (LIG Nex1 Co., Ltd.)
Publication Information
Korean Journal of Optics and Photonics / v.33, no.6, 2022 , pp. 310-316 More about this Journal
Abstract
In this paper, the difference in modulation transfer function (MTF) results according to the change in the angle of a slant target when measuring a presampled MTF was confirmed, and the difference was reduced by fitting the edge spread function graph obtained to reduce the error by the target's rotation. Due to the feature of the presampled MTF method, the spatial frequency changed due to the sensor's projected intensity being changed by the target's rotation, and it was confirmed that the difference in the MTF value occurred depending on the rotation angle of the target. In this paper, the MTF was calculated after fitting only one column of the acquired image. It was confirmed that the rotation error is smaller compared to the case of the presampled MTF method and this fitting method can be applied to a scene that contains various target angles, such as auto-focusing using the MTF.
Keywords
Optical system modulation transfer function (MTF); Presampled MTF;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 A. P. Tzannes and J. M. Mooney, "Measurement of the modulation transfer function of infrared cameras," Opt. Eng. 34, 1808-1817 (1995).   DOI
2 B.-H. Son, H.-Y. Lee, J.-B. Song, H.-S. Yang, and Y.-W. Lee, "Development of a MTF measurement system for an infrared optical system," Korean J. Opt. Photonics 26, 162-167 (2015).   DOI
3 K. Fetterly and N. Hangiandreou, "Image quality evaluation of a desktop computed radiography system," Med. Phys. 27, 2669-2679 (2000).   DOI
4 Z. Zhou, Q. Zhu, F. Gao, H. Zhao, L. Zhang, and G. Li, "A method to measure the presampling MTF in digital radiography using Wiener deconvolution," Proc. SPIE 8573, 85730R (2013).
5 F. Viallefont-Robinet, D. Helder, R. Fraisse, A. Newbury, F. van den Bergh, D. Lee, and S. Saunier, "Comparison of MTF measurement using edge method: toward reference data set," Opt. Express 26, 33625-33648 (2018).   DOI
6 K. Masaoka, "Edge-based modulation transfer function measurement method using a variable oversampling ratio," Opt. Express 29, 37628-37638 (2021).   DOI
7 E. Samei, M. J. Flynn, and D. A. Reimann, "A method for measureing presampled MTF of digital radiographic system using an edge test device," Med. Phys. 25, 102-113 (1998).   DOI