The influence of SNR on MTF measurement

Muxin Zhang; Liying Liu; Ye Li; Kewei Huan; Feng Zheng; Xiaoguang Shi

doi:10.1117/12.2216052

5 November 2015 The influence of SNR on MTF measurement

Muxin Zhang, Liying Liu, Ye Li, Kewei Huan, Feng Zheng, Xiaoguang Shi

Proceedings Volume 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015; 97951N (2015) https://doi.org/10.1117/12.2216052
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held June-July 2015, 2015, Hefei, Suzhou, and Harbin, China

Abstract

The Modulation Transfer Function (MTF) is a fundamental imaging system design specification and system quality metric often used in remote sensing. The MTF describes the attenuation of sinusoidal waveforms as a function of spatial frequency. Practically, MTF is a metric quantifying the sharpness of the reconstructed image. The Knife-Edge method is becoming widely applied for its advantage of simplified target and accurate computer calculation. Noise in CCD image system is inevitable, thus the SNR becomes a factor influencing the MTF measurement. In this paper, we build relationships between SNR, luminance and MTF. In conclusion, SNR is related with luminance levels linearly. SNR rises with increasing luminance. The higher SNR, the more curves conform to the theoretical MTF.

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Muxin Zhang, Liying Liu, Ye Li, Kewei Huan, Feng Zheng, and Xiaoguang Shi "The influence of SNR on MTF measurement", Proc. SPIE 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015, 97951N (5 November 2015); https://doi.org/10.1117/12.2216052

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KEYWORDS

Signal to noise ratio

Modulation transfer functions

Imaging systems

Charge-coupled devices

Spatial frequencies

Image quality

CCD image sensors

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