First, the outline of the present example embodiment will be described. In a data processing apparatus of the present example embodiment, data to be analyzed is moving image data captured at the same place over a predetermined time period. The data processing apparatus analyzes the moving image data, and extracts a person whose appearance frequency (for example, the number of appearances or an appearance rate) in the moving image data satisfies a predetermined condition (for example, higher than a predetermined level) among persons detected in the moving image data. Then, information regarding the extracted person (for example, a face image acquired from the moving image data) is outputted.

For example, a criminal who commit crimes, such as pickpocketing, molesting, and surreptitious shooting, frequently appears at the crime site for viewing a site in advance for a crime or linger unnaturally long in the place in order to search for a crime target. By providing the data processing apparatus of the present example embodiment with moving image data as data to be analyzed obtained by capturing the crime site or its surroundings, it is possible to extract a person having a high appearance frequency at the place.

As described above, according to the data processing apparatus of the present example embodiment, a person (person to be retrieved) satisfying a predetermined condition can be retrieved from the moving image data, even under the circumstances of not being able to provide the apparatus with the feature value of the person to be retrieved, since the person to be retrieved has not been identified.