Patent ID: 8300063

Claim:
A projection system comprising: an information processing apparatus that carries out image processing on an input image source; a projector that projects an image on a screen based on an image data signal outputted from the information processing apparatus; and a signal transmission unit that carries signals between the information processing apparatus and the projector, wherein the information processing apparatus includes: a shape conversion unit that generates shape-converted image data converted such that the image data is properly represented on the screen when the image data is projected from the projector towards the screen; a converted-image preservation unit that sequentially preserves the shape-converted image data that is shape-converted by the shape conversion unit; a modified-part detection unit that compares latest shape-converted image data, which is shape-converted by the shape conversion unit, with preceding shape-converted image data, which is preserved in the converted-image preservation unit, and detects, as a modified part, part of the latest shape-converted image data that is modified from the preceding shape-converted image data, the preceding shape-converted image data being generated based on a first image data which represents a first image to be displayed, the latest shape-converted image data being generated based on a second image data which represents a second image to be displayed and the second image being displayed after the first image is displayed; 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 detected by the modified-part detection unit, and wherein the projector includes a current-image frame generation unit that generates a new current-image frame including the modified-image data from the information processing apparatus.