As an intuitive form of expression, graphic pictures have more information capacity than text information, and drawed more and more people’s attention in the Reverse Engineering Electronic PCB Card Component Connection Treatment. In order to express the component connection information more intuitively, a graphical expression with strong interactive ability and rich information is adopted.
When designing the graphical symbols of circuit components, the component library is constructed in the form of blocks or shapes. In the design of electrical components, the electrical component symbol library derives the graphical object class from the object base class, and then derives the connection base class and components. There are two major categories of symbols, and finally electrical wiring classes and electrical components are derived.
The files in the component library are sorted by manufacturer. The components produced by each manufacturer are placed in the same file (clip). For some manufacturers, there are many types of components, and in order to facilitate the management of component libraries, the components produced by these manufacturers are classified according to functions.
For the graphical representation of the component, the following ten basic graphics are extracted, namely rectangular frame, joint, polyline, rectangular frame with rounded corners, ellipse, polygon, pin, arc, text, B-spline curve.
