Convolution-controlled rotation and scale invariance in optical correlationA method is presented for evoking a controlled, continuously-variable degree of rotation- and scale-invariance in optical correlation; the method is suitable for off-line computation of filters, though not for real-time computation. While a closed-form solution for the blur kernels has thus far evaded solution, a digital approximation method has been presented. A simulated correlation run with real, frame-grabbed imagery has indicated the method's desired performance. These Gaussian blur kernels can be replaced with box-car kernels or other blur kernels suitable for the given correlation-task.
Document ID
19890036176
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Juday, Richard D. (NASA Johnson Space Center Houston, TX, United States)
Bourgeois, Brian (Houston, University TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Cybernetics
Meeting Information
Meeting: Digital and Optical Shape Representation and Pattern Recognition