1. A delivery processing apparatus comprising: a recognition unit which performs recognition processing for recognizing information provided on a delivery target item based on an image obtained by capturing the image of the delivery target item; and a determination unit which determines whether or not to extend the recognition processing performed by the recognition unit based on a degree of progress of the recognition processing that has been performed by the recognition unit in a period from when the recognition processing was started by the recognition unit until a predetermined time has elapsed, and an extension rate that indicates a ratio of the number of times that the recognition unit has extended the recognition processing to the number of times that the recognition unit has performed the recognition processing.