1. A system, comprising: a processor configured to: extract a subimage from a received image comprising information pertaining to a plurality of numerical characters, wherein the extracted subimage is associated with one of the plurality of numerical characters; perform recognition based at least in part on a set of topological information associated with the subimage, including: process the subimage to obtain the set of topological information associated with the subimage, wherein the processing of the subimage includes: obtain the set of topological information by extracting one or more vertices and one or more edges associated with the subimage; and add a central point representing a closed ring to the set of topological information; compare the set of topological information associated with the subimage with a preset set of stored topological information, comprising: compare an order in which the extracted one or more vertices were detected during a traversal process with an order of vertices of the preset set of stored topological information, the traversal process beginning from a predefined pixel of the subimage and continuing to a next filled in pixel in a predefined order; determine that in the event that the set of topological information associated with the subimage matches the preset set of stored topological information, the subimage is associated with a recognized numerical character associated with the preset set of stored topological information; and a memory coupled to the processor and configured to provide the processor with instructions.