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: a pair of cameras comprising first and second cameras having the same structure and configured to capture first and second images of the subject using different imaging conditions defined, respectively, for the pair of cameras in order to each obtain individual information on the subject; and an information integration unit configured to integrate the individual information included in image data from two channels captured by the pair of cameras, respectively, so as to generate output image data through one channel.