Abstract: This paper designs and implements a camera-based informationcard review system, which consists of a series of image process operations such as image acquisition, converting RGB into grayscale image, binary image, optic aberrance revising, skew angle correction, locating and identifying of image. Then optimized and refactored the framework of the system according to the systematic research of software refactoring and design patterns. This paper makes full refers to design patterns and improves the quality of existing code by the refactoring technology, and increases the system’s maintainability and reusability.

Key words: software refactoring, design patterns, camera-based scoring