PROJECTION SYSTEM, INFORMATION PROCESSING APPARATUS

A projection system includes an information processing apparatus; a projector; and a signal transmission unit that carries signals between the information processing apparatus and the projector. The information processing apparatus includes a shape conversion unit that generates shape-converted image data that is properly represented when projected from the projector; a converted-image preservation unit that sequentially preserves the shape-converted image data; a modified-part detection unit that compares latest shape-converted image data with preceding shape-converted image data, and detects, as a modified part, part of the latest shape-converted image data that is modified from the preceding shape-converted image data; and a modified-image data generation unit that generates modified-image data of the modified part by adding color-tone data to each pixel in the modified part, and where the projector includes a current-image frame generation unit that generates a new current-image frame based on the modified-image data.