Next, the configuration of the data processing apparatus of the present example embodiment will be described in detail. A functional block diagram of the data processing apparatus 1 of the present example embodiment is shown in FIG. 2. 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 to be analyzed satisfies a predetermined condition among persons detected in the analyzed moving image data.

The moving image data to be analyzed of the present example embodiment is moving image data captured over a predetermined time period at a plurality of places different from each other. For example, as shown in FIG. 12, pieces of child data (moving image data) captured by each of security cameras 2-1 to 2-N installed at a plurality of places different from each other are inputted to the data processing apparatus 1 as moving image data 100 to be analyzed. The child data (moving image data) captured by each of the security cameras 2-1 to 2-N includes a plurality of frames F captured over a predetermined time period T₁ to T_N.

The person extraction unit 10 determines whether or not each person detected in the moving image data to be analyzed appears in each of a plurality of pieces of child data, and calculates the appearance frequency based on the determination result. Hereinafter, an example of the determination processing will be described.