1. A detective information registration device for registering detective characteristic information that is information for detecting target objects included in a moving image captured and that is also information characterizing the target objects, the detective information registration device comprising: a storage section for storing information; image obtaining means for obtaining a frame image in the moving image; tracking-purpose characteristic extracting means for extracting tracking-purpose characteristic information from the frame image and storing the tracking-purpose characteristic information into the storage section, the tracking-purpose characteristic information being information for tracking a target object included in the moving image captured and also being information characterizing the target object; target object area detecting means for detecting an image area of the target object, based on a change between the tracking-purpose characteristic information extracted by the tracking-purpose characteristic extracting means and the tracking-purpose characteristic information relevant to the frame image stored in the past into the storage section; detective characteristic extracting means for extracting the detective characteristic information from the image area of the target object, the image area being detected by the target object area detecting means; and detective characteristic registration means for registering, into the storage section, a part or all of the detective characteristic information extracted by the detective characteristic extracting means.