Image enhancement by nonlinear extrapolation in frequency space
A procedure for creating images with higher resolution than the sampling rate would allow is described. The enhancement algorithm augments the frequency content of the image using shape-invariant properties of edges across scale by using a non-linearity that generates phase- coherent higher harmonics. The procedure utilizes the Laplacian pyramid image representation. Results are presented depicting the power-spectra augmentation and the visual enhancement of several images. Simplicity of computations and ease of implementation allow for real-time applications such as high-definition television.
© 1994 Society of Photo-Optical Instrumentation Engineers (SPIE). C. H. Anderson was with the Jet Propulsion Laboratory, Pasadena CA, at the time of the research. This research was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
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