Shape feature self-defining and recognition system

The invention aims at solving the problems that types of recognizable shape features are limited, new shape features are difficult to add and the like of a CAPP (Computer-Aided Process Planning) or CAIP (Computer Assisted Index Program)system shape feature recognition method in the prior art, and provides a shape feature self-defining and recognition system. The shape feature self-defining and recognition system comprises a feature library for storing feature templates of various shape types, a feature manager for managing the feature templates in the feature library and a feature recognizer for recognizing shape features, is embedded in a mechanical part CAPP or CAIP system and provides feature recognition results to the CAPP or CAIP system. The shape feature self-defining and recognition system has the beneficial effects that under the condition that no change is made to the CAPP or CAIP system, the feature recognition range of the system can be conveniently expanded, the flexibility and the applicability o