\input zb-basic
\input zb-ioport
\iteman{io-port 03669884}
\itemau{Rowe, Paul P.}
\itemti{Some nonlinear operators for picture processing.}
\itemso{Pattern Recognition 11, 341-342 (1979).}
\itemcc{}
\itemut{nonlinear operators; picture processing; non-negative function; partial differential equation; diffusion; Taylor's series; Laplacian; grey level}
\itemli{doi:10.1016/0031-3203(79)90044-X}
\end