1. An information processing system adapted to generate output image data by capturing an image of a subject and successively acquiring data of the image, comprising: first and second cameras configured to capture first and second images of the subject, respectively; an image analysis unit configured to process the first image such that at least one region of interest of the subject found within the first image is identified; a control unit configured to cause the first and second cameras to capture the first and second images of the subject using respective imaging parameters, and to cause the second camera to capture the second image of the subject such that the second image is limited to the at least one region of interest; and an information integration unit configured to integrate the first and second images so as to generate the output image data by substituting image data of the first image corresponding to the at least one region of interest of the subject with image data of the second image, wherein: the second image captured by the second camera is subject to an imaging condition defined to track a target within the subject, the image analysis unit is configured to recognize motion by the target by: (i) tracking the target in the second image captured by the second camera, (ii) determining a pattern of the motion of the target in the second image, (iii) comparing the pattern of motion of the target with a plurality of predetermined patterns of motion, and (iv) selecting one or more of the predetermined patterns of motion based on the comparison, and the information integration unit generates the output image data by processing the first image captured by the first camera and including the target in accordance with the selected one or more predetermined patterns.