CIS Seminar: Norman Koren
Imaging Science Seminar
New slanted edge measurements: Information Capacity and more
Norman Koren
Founder, Imatest, LLC
We will introduce Imatest's standard image quality measurements, then briefly introduce information capacity, a more fundamental figure of merit for machine vision and artificial intelligence systems. We will describe how spatial and frequency-dependent noise can be derived from slanted edges, and how this enables a rich set of measurements. We show a new image that displays the visibility of small squares in the measured system (closely related to SNRi).
Abstract: The talk starts with a brief overview of Imatest's standard image quality measurements-- sharpness, noise, color accuracy, tonal response, optical distortion, and more, which are derived from a variety of test chart images. Then we briefly introduce information capacity, which is a more fundamental figure of merit for machine vision and artificial intelligence (MV/AI) systems. We describe how spatial and frequency-dependent noise can be derived from slanted edges, and how this enables a rich set of measurements (many used for medical imaging, but unfamiliar elsewhere) that include information capacity (derived from two different calculations), Noise Power Spectrum (NPS), Noise Equivalent Quanta (NEQ), Ideal observer SNR (SNRi), and Noise autocorrelation (possibly related to sensor electrical crosstalk). We show a new image that displays the visibility of small squares in the measured system (closely related to SNRi). Finally we discuss plans for future work.
Speaker Bio: Norman Koren became interested in photography while growing up near the George Eastman House photographic museum in Rochester, NY. He received his BA in physics from Brown University (1965) and his Masters in physics from Wayne State University (1969). He worked in the computer storage industry simulating digital magnetic recording systems and channels for disk and tape drives from 1967-2001. He founded Imatest LLC in 2003 to develop software and test charts to measure the quality of digital imaging systems.
Intended Audience: Undergraduates, graduates, and experts.
Event Snapshot
When and Where
Who
Open to the Public
Interpreter Requested?
No