It should be noted that, although not illustrated, the information processing apparatus 10 includes an image analysis unit which performs image analysis on image data. The image analysis unit detects a person by performing image analysis on a provision image data, and extracts a feature value from an image of an area including the detected person. The image analysis unit may detect a specific part of the person, for example, the face of the person, and extract the feature value from image data of the area including the detected face. It should be noted that, in this specification, an image (or image data) in which a person is detected by image analysis is referred to as an image (or image data) including a person, in some cases. The storage unit 11 may store the feature value extracted from each provision image data in association with the provision image data.

The obtainment unit 12 obtains reference image data (a reference image) generated by the reference-image generation camera.

The extraction unit 13 extracts provision image data including a person included in the reference image data, from the storage unit 11.

For example, the image analysis unit described above performs image analysis on the reference image data, detects a person included in the image, and extracts a feature value from an image of an area including the detected person. The extraction unit 13 collates the feature value extracted from the reference image data with the feature value extracted from the provision image data stored in the storage unit 11, and extracts provision image data associated with the feature value having a similarity equal to or higher than a predetermined value.