1. An information recognition system, comprising: a display section displaying an image on a display surface at a predetermined display resolution; an image combining section combining a character entry guide with the image, the character entry guide assisting handwritten input to the display surface; an information detecting section detecting handwritten input information at a detection resolution which is higher than the display resolution, the handwritten input information input to the display surface according to the character entry guide; and a character recognizing section performing character recognition based on the information detected at the detection resolution, wherein the display surface is a projection surface on which the image is projected by a projector provided with at least the display section, and the information recognition system further comprises: a distance detecting section detecting a projection distance to the projection surface; and a size obtaining section obtaining the size of the character entry guide based on the projection distance and a predetermined number of pixels required for character recognition.