Patent Document ID: 9600731
Application ID: 14681899

Base Claim:
1. An image processing apparatus comprising: an interface configured to receive, from an external apparatus, a first image and a second image, wherein the first image is different from the second image; and a processor configured to: extract a first character string appearing on the first image, and a second character string and a third character string appearing on the second image, cut out each of characters constituting the first character string, in units of a character, cut out each of characters constituting the second character string, in units of a character, and cutting out each of characters constituting the third character string, in units of a character, calculate a first similarity degree group which is composed of similarity degrees between the respective characters constituting the first character string and respective candidate characters in a candidate character group, calculate a second similarity degree group which is composed of similarity degrees between the respective characters constituting the second character string and the respective candidate characters in the candidate character group, calculate a third similarity degree group which is composed of similarity degrees between the respective characters constituting the third character string and the respective candidate characters in the candidate character group, and determine which of the second character string and the third character string corresponds to a first subject which is identical to the first character string, by comparing the first similarity degree group with the second similarity degree group and the third similarity degree group.

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Claim 3:
3. The image processing apparatus of claim 1 , wherein the processor is further configured to: calculate a similarity degree between a histogram of the first similarity degree group and a histogram of the second similarity degree group, calculate a similarity degree between the histogram of the first similarity degree group and a histogram of the third similarity degree group, determine that the second character string corresponds to the first subject which is identical to the first character string if the histogram of the first similarity group is more similar to the histogram of the second similarity group than to the third similarity degree group, and determine that the third character string corresponds to the first subject which is identical to the first character string if the histogram of the first similarity group is more similar to the histogram of the third similarity group than to the second similarity degree group.