The first is to find coupling breakpoints for repair. This kind of repair is accurate. However, finding coupling breakpoints requires a large amount of computation and complex programming.
The second method is based on morphology. The principle is to process the image by selecting structural elements of a certain shape and size and scanning the image pixels completely. This method is difficult to repair large fracture.
The third is to propose a new repair method according to the structural characteristics of metal sign characters and the statistical information of the characters to be recognized: firstly, determine the repair length according to the normalized image matrix size of metal sign characters and the summarized statistical information, detect the endpoint (including breakpoints), and use a certain number of connected elements at the endpoint to fit the possible continuous model, Then, according to the repair length "pre extension", if there is an intersection in the judgment interval after the continuous model is extended, it is determined as a breakpoint, and the fracture is fitted again to determine the continuity model for interpolation repair.
