An information processing apparatus includes a camera interface configured to connect to a camera, and a processor configured to control the camera via the camera interface to capture an image of a plurality of articles and a shelf displaying the articles, determine a plurality of article IDs for the articles shown in the captured image using a feature value of each of the articles, and based on shelf allocation plan information that associates a shelf ID of each of a plurality of shelves with a plurality of article IDs for articles displayed on the shelf, determine a shelf ID of the shelf shown in the captured image. The determined shelf ID is associated with one or more of the determined article IDs.