Image Processing Software Conversion. Computer Program Documentation and Computer Programming Manual.

摘要

This report describes the software design of the portion of the RADC image processing system that has been converted to execute on a PDP 11/45computer. Certain changes in the design philosophy have been adopted in this conversion. The independent operating system approach has been dropped in favor of DEC's Disk Operating System. This allows a broader range of disk peripherals to be accessed at a reasonable system development cost. The data file I/0has been centralized to reduce future software development costs and to increase reliability. In fact,several areas of the software have been modularized to reduce redundancy and to improve the maintainability of the overall software system. The converted software package has also been improved from the viewpoint of man-machine interaction. Experience gained through use of the previous system has revealed certain areas where changes are desirable. One such improvement that was made was the adoption of a centralized error reporting scheme. This scheme allowed a more direct control over the errors that were reported by each routine. As a result,the errors are limited to a small set that explains the error conditions more clearly to the user. This and other improvements in the individual option capabilities have resulted in a more powerful and more easily used system. (Author)