A computer-readable storage medium has stored therein an information processing program that causes a computer of an information processing apparatus to operate as: means for sequentially obtaining an image; means for detecting a specific object from the obtained image; means for detecting, on the basis of a first threshold and a pixel value obtained from a first region of the detected specific object, first region information on the first region; calculation means for calculating a second threshold on the basis of the pixel value obtained from the first region when the first region information is detected; means for detecting, on the basis of the second threshold calculated by the calculation means and a pixel value obtained from a second region of the detected specific object that is different from the first region, second region information on the second region; and means for outputting at least the second region information detected.