1. An information processing device comprising:a picture data acquisition unit configured to sequentially acquire picture data of frames of a moving picture obtained by photographing;
a picture adding unit configured to generate a sum picture obtained by adding, to pixel values of a picture of a current frame newly acquired, pixel values of a picture of a past frame acquired earner, the pixel values added together being those of pixels at corresponding positions;
an output unit configured to output data representing a result of a predetermined process performed using the sum picture; and
an image analysis unit configured to perform an analysis process by extracting a feature point from the sum picture, and acquire information about a subject, wherein the output unit outputs data representing a result of information processing performed on a basis of the information about the subject, and wherein the image analysis unit performs an analysis process on a basis of the feature point extracted from the sum picture, performs an analysis process by extracting a feature point from the picture of the current frame, and integrates results of both.