Programmer's Manual for the CHAP Line-Drawing Processing Language (Revised).

摘要

This report describes CHAP, a computer language for processing line drawings represented in terms of the 8-direction chain code. The language consists of a set of FORTRAN subroutines, most of which are machine independent. The subroutines may be called by a user program to accomplish specific line-drawing processing tasks. The chain data is stored in packed (machine-dependent) form and is unpacked for processing. The report lists all currently available CHAP subroutines and provides all necessary information for a CHAP programmer. Specific information for different machine implementations are given in the appendices. Implementations exist for IBM 360, UNIVAC 1108/1110, CDC 6600, and ADAGE AGT 30/130. Versions for other machines can be readily generated. (Author)