1. An image recognition apparatus comprising: a recognition operation section implemented by one or more hardware processors, the one or more hardware processors further configured to, when one or a plurality of feature value elements exceeding a set value indicating an appearance frequency appear, transmit a read request of one or a plurality of dictionary elements corresponding to the one or plurality of feature value elements to a dictionary control section and acquire the one or plurality of dictionary elements from the dictionary control section, the recognition operation section comprising: a feature-value calculating section configured to calculate a feature value in a region of interest segmented from an image, the feature value including the plurality of feature value elements; and a likelihood calculating section configured to calculate likelihood of an object present in the region of interest referencing the feature value including the plurality of feature value elements and dictionary data including a plurality of dictionary elements corresponding respectively to the plurality of dictionary elements; and the dictionary control section implemented by the one or more hardware processors, the one or more hardware processors further configured to record the read request in the discrimination data, and on the basis of the discrimination data, configured to acquire the dictionary element for which the read request is recorded and not to acquire the dictionary element for which the read request is not recorded.