Modulation transfer function determination of video capture cards by speckle patterns

Antonio M. Pozo; José J. Castro; Manuel Rubiño

doi:10.1117/12.978187

11 September 2012 Modulation transfer function determination of video capture cards by speckle patterns

Antonio M. Pozo, José J. Castro, Manuel Rubiño

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 841316 (2012) https://doi.org/10.1117/12.978187
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

Abstract

Today, video cameras connected to frame grabbers or video capture cards (VCCs) are used in many applications such as traffic control, surveillance, medical systems or machine vision. In this work, we present a method for determining the spatial-frequency response of VCCs. This method is based on the modulation transfer function (MTF) determination from speckle patterns using a low-cost experimental setup. We have evaluated and compared three different VCCs. The three VCCs produce an amplification (boost) in the horizontal MTF in a different spatial-frequency range, also differing in the maximum amplification value.

Citation Download Citation

Antonio M. Pozo, José J. Castro, and Manuel Rubiño "Modulation transfer function determination of video capture cards by speckle patterns", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 841316 (11 September 2012); https://doi.org/10.1117/12.978187

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KEYWORDS

Voltage controlled current source

Modulation transfer functions

Video

Cameras

Speckle pattern

Video surveillance

Charge-coupled devices

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