1. An information processing device comprising: a database that stores focused feature quantities of two or more reference images, the database being configured such that identification information for identifying an object in each reference image and an attribute value related to a lighting condition under which the object was imaged are associated with a focused feature quantity of each reference image; an acquisition unit configured to acquire an input image captured by an imaging device; and a recognition unit configured to recognize an object in the input image by checking a determined feature quantity determined from the input image against focused feature quantities of selected images of the reference images that have been selected as a targeted search subset, wherein the focused feature quantities stored in the database include focused feature quantities of a plurality of images of an identical object captured under different lighting conditions, the acquisition unit further acquires lighting condition data representing a lighting condition under which the input image was captured, the information processing device further comprises a filtering unit configured to create the targeted search subset by selecting and extracting, from the database, only those focused feature quantities of the selected images of the reference images that were captured under lighting conditions that are similar to the lighting condition represented by the lighting condition data based on at least one of similarly between time conditions related to date or time when each image was captured and similarly between weather conditions related to weather in which each image was captured, the recognition unit checks the focused feature quantities of the selected images extracted by the filtering unit against the determined feature quantity determined from the input image, and the object in the input image is recognized when a matching score computed as a result of the checking is above a predetermined threshold, and for the recognition unit to recognize the object in the input image, the recognition unit checks only the focused feature quantities of the selected images that have been selected for the targeted search subset without consideration of the focused feature quantities of images of the references image that have not been selected for the targeted search subset.