Next, the configuration of the data processing apparatus of the present example embodiment will be described in detail. FIG. 2 shows an example of the functional block diagram of a data processing apparatus 1 of the present example embodiment. As shown in FIG. 2, the data processing apparatus 1 has a person extraction unit 10 and an output unit 20.

The person extraction unit 10 analyzes moving image data to be analyzed, and extracts a person whose appearance frequency in the moving image data satisfies a predetermined condition from persons detected in the moving image data.

The moving image data to be analyzed in the present example embodiment is moving image data captured at the same place over a predetermined time period. For example, as shown in FIG. 3, moving image data captured by a security camera 2 installed at a predetermined place is inputted to the data processing apparatus 1 as moving image data 100 to be analyzed. The moving image data 100 includes a plurality of frames F over a predetermined time period T.

The person extraction unit 10 analyzes the moving image data 100 in units of time windows, each time window having a time width shorter than the predetermined time period T (for example, 30 seconds, one minute, 30 minutes, one hour, or one day). Then, determination is made on whether each person detected in the moving image data 100 appears in each of a plurality of the time windows. Hereinafter, an example of the determination processing will be described. However, the present invention is not limited thereto.