Samenvatting
A library of subroutines that efficiently implement Burt's (1981) hierarchical discrete correlation (HDC) is described. The subroutines are written in Professional FORTRAN for IBM PCs or compatibles. Subroutines are included for both even and odd forms of the HDC, as well as for the corresponding algorithms for pyramid processing. This library contains the forms of HDC that are most widely used in image processing and visual modelling.