Real-Time Measurement of Ultra-High Definition Camera Modulation Transfer Function

The authors are solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the Abstract. This paper presents a system capable of measuring the modulation transfer function (MTF) of a broadcast camera based on its knife-edge responses in real time. This method can be applied to multiple edges in arbitrary directions, unlike the conventional slanted-edge method in the ISO 12233 standard in which only a near-horizontal or vertical edge in a rectangular region of interest (ROI) can be analyzed. The new measurement system significantly facilitates the evaluation of the performances of the camera and lens as well as accurate focusing in an objective manner. Analysis of multidirectional edges on a starburst chart yields a contour plot of the multidirectional MTF for direct observation of the anisotropy due to not only the misalignment of the optical axis of the imaging system but also the pixel arrangement of the image sensor and image processing.

Published

2017-10

Content type

Original Research

Keywords

Multidirectional MTF, real-time measurement, knife-edge response

DOI

10.5594/M001795

ISBN

978-1-61482-959-1