A portable high-speed digital image processing instrument for the enhancement of television images
Lawrence Bruce Hewitt, Leonard T. Bruton, N.R. Bartley · IEEE Transactions on Instrumentation and Measurement · 1986
It is known that digital images may be usefully enhanced using two-dimensional (2D) recursive filters. The associated digital filter algorithms must have acceptable word lengths and be implement-able over the entire image at an acceptable processing speed. Spatial-integrator 2D filtering algorithms and recursion along diagonal lines of pixels are used to permit the design and construction of a fast, portable, and low-cost television image-enhancement instrument. Menu-driven software permits the nonspecialist user to enhance television images in less than 4 s using any of 27 different 2D filter transfer functions.