1. An image capturing apparatus comprising: an image capturing section that takes an image; an object extracting section that extracts an object included in the image taken by said image capturing section; a characteristic amount computing section that computes an amount of characteristic of the object extracted from said object extracting section based on the image with the object extracted from said object extracting section; a characteristic amount storing section that stores the amount of characteristic of the object computed from said characteristic amount computing section in association with object identification information identifying the object; and an object identification information storing section that stores the object identification information identifying the object included in the image in association with the image taken by said image capturing section.