Dictionary data registration apparatus for image recognition, method therefor, and program

A dictionary data registration apparatus comprising:

• a dictionary configured to store a local feature amount for each region of an image with respect to each of a plurality of categories;
• an extraction unit configured to extract respective local feature amounts from each of a plurality of regions of a plurality of input images of a category;
• a discrimination unit configured to discriminate an attribute of each of the extracted local feature amounts;
• a first selection unit configured to select a representative local feature amount having a representative variation from the plurality of the local feature amounts for each region extracted by the extraction unit from that region of the plurality of input images based on the attribute of each of the extracted local feature amounts;
• a calculation unit configured to calculate a similarity between the extracted local feature amounts;
• a second selection unit configured to select a local feature amount based on the similarity between that local feature amount and the representative local feature amount;
• and
• a registration unit configured to register the representative local feature amount and the local feature amount selected by the second selection unit on the dictionary as a local feature amount for that region with respect to the category.