Parameter set optimization apparatus, parameter set optimization program, and paper sheet handling system

A non-transitory computer-readable recording medium having stored therein a parameter set optimization program that causes a computer to execute a processes, the processes comprising:

• a first generation process that generates a parameter set of a program by using a Genetic Algorithm, the program being used when character present regions in which characters that form a serial number are present are identified;
• an identification process that identifies, from an image of a paper sheet, the character present regions by using the generated parameter set;
• a first calculation process that calculates a first evaluation value related to the number of characters in the identified character present regions, a second evaluation value related to character spacing in the identified character present regions, and a third evaluation value related to a character string width in the identified character present regions;
• a second calculation process that calculates a fitness of the parameter set based on the first evaluation value, the second evaluation value and the third evaluation value;
• a determination process that determines a parent parameter set of the Genetic Algorithm based on the calculated fitness;
• a second generation process that generates a child parameter set of the Genetic Algorithm by performing crossover and mutation to the parent parameter set;
• and
• an optimization process that optimizes the parameter set by repeating the identification process, the first calculation process and the second calculation process until a predetermined termination condition is met when the number of generations of the Genetic Algorithm reaches a predetermined value.

A paper sheet handling system comprising:

• a paper sheet handling apparatus that, by executing a program, identifies, from an image of a paper sheet, character present regions in which characters that form a serial number are present;
• and
• a parameter set optimization apparatus that optimizes a parameter set of the program, wherein
• the parameter set optimization apparatus includes a processor, wherein the processor executes:
• a first generation process that generates the parameter set by using a Genetic Algorithm;
• an identification process that identifies, from an image of the paper sheet, the character present regions by using the generated parameter set;
• a first calculation process that calculates a first evaluation value related to the number of characters in the identified character present regions, a second evaluation value related to character spacing in the identified character present regions, and a third evaluation value related to a character string width in the identified character present regions,
• a second calculation process that calculates a fitness of the parameter set based on the first evaluation value, the second evaluation value and the third evaluation value;
• a determination process that determines a parent parameter set of the Genetic Algorithm based on the calculated fitness;
• a second generation process that generates a child parameter set of the Genetic Algorithm by performing crossover and mutation to the parent parameter set;
• and
• an optimization process that optimizes the parameter set by repeating the identification process, the first calculation process and the second calculation process until a predetermined termination condition is met when the number of generations of the Genetic Algorithm reaches a predetermined value.