1. An information processing system comprising: a housing having at least a front surface and side surfaces; a camera for capturing an image in a side surface direction of the housing; and, one or more computer processors for executing instructions such that the information processing system is at least configured to: calculate, based on a camera image obtained by the camera, a two-dimensional position of the object on the camera image and calculate a three-dimensional position of an object included in the camera image based on the two-dimensional position; specify a shape of an image area of the object on the camera image based on the camera image based on the calculated two-dimensional position, the shape of the image area of the object being a two-dimensional shape; perform an information process in accordance with the three-dimensional position and the shape of the image area of the object, determine a determination range based on the position of the three-dimensional position of the object, wherein a size of the determination range is variable; and determine the shape of the image area of the object based on a number of areas of the object outside of the determination range and on the camera image; wherein the image area of the object is the entirety of an area of the object on the camera image; and the areas of the object outside of the determination range are partial areas of the entirety of the area of the object and are areas separate from each other.