University of Rochester
Isberg, Thomas Arthur (1961 - ).
Quantum-limited image recognition.
Degree: PhD, 2017, University of Rochester
Correlation-based methods for automatic image
recognition are implemented using a position-sensitive,
photon-counting detection system. It is demonstrated that
information provided by a small number of detected photoevents can
be used to accurately estimate the cross correlation between a
classical-intensity input scene and a reference (or filter)
function stored in computer memory. A theoretical formalism is
developed that describes the behavior of the quantum-limited
correlation signal for complex filter functions. The theoretical
predictions are verified experimentally using a position-sensitive
photon-counting detection system. The speed at which the detection
system operates makes this an effective technique for implementing
correlation based methods for image recognition in real time, even
when there is an abundance of input illumination.
</br>First, image correlation at low light levels
is investigated. When the reference function that is stored in
computer memory is a digitized version of the classical intensity
input object, the correlation output corresponds to that of a
conventional matched filter. It is demonstrated that as few as 1000
detected photoevents provide sufficient information to discriminate
accurately among a set of engraved portrait images.
</br>Rotation-invariant image recognition using a
rotation-invariant circular-harmonic filter is also implemented
using photon-counting techniques. In addition, a new method is
demonstrated for normalizing the correlation output in real time
using the positional information from the detected photoevents.
This new normalization may allow rotation-invariant
circular-harmonic filters to be utilized in a cluttered
to Zotero / EndNote / Reference
APA (6th Edition):
Isberg, T. A. (. -. ). (2017). Quantum-limited image recognition. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/32185
Chicago Manual of Style (16th Edition):
Isberg, Thomas Arthur (1961 - ). “Quantum-limited image recognition.” 2017. Doctoral Dissertation, University of Rochester. Accessed October 21, 2017.
MLA Handbook (7th Edition):
Isberg, Thomas Arthur (1961 - ). “Quantum-limited image recognition.” 2017. Web. 21 Oct 2017.
Isberg TA(-). Quantum-limited image recognition. [Internet] [Doctoral dissertation]. University of Rochester; 2017. [cited 2017 Oct 21].
Available from: http://hdl.handle.net/1802/32185.
Council of Science Editors:
Isberg TA(-). Quantum-limited image recognition. [Doctoral Dissertation]. University of Rochester; 2017. Available from: http://hdl.handle.net/1802/32185