Title :
Bi-impulse response design of isotropic quadratic filters
Author :
Ramponi, Giovanni
Author_Institution :
Dept. of Electr. Eng., Trieste Univ., Italy
fDate :
4/1/1990 12:00:00 AM
Abstract :
The bi-impulse response of a 1-D or 2-D quadratic Volterra filter is introduced as a mathematical tool able to completely describe the nonlinear operator. The conditions that must be satisfied in order to obtain isotropic input/output relations are studied. The result is a formal framework that allows simple but effective operators (particularly for image enhancement and preprocessing) to be designed and a deeper insight into the properties of Volterra filters to be acquired. Examples of design and of the performance obtained by processing natural and synthetic images are presented
Keywords :
filtering and prediction theory; frequency response; picture processing; bi-impulse response; image enhancement; isotropic input/output relations; isotropic quadratic filters; natural images; nonlinear operator; preprocessing; quadratic Volterra filter; synthetic images; Books; Digital signal processing; Image enhancement; Innovation management; Nonlinear filters; Nonlinear systems; Power system modeling; Signal analysis; System identification; Transfer functions;
Journal_Title :
Proceedings of the IEEE
