Patent attributes
A projection system and a projection method are provided. The projection system includes a processing module, a projection module and a photographing module. The projection module is coupled to the processing module, and projects a first projection image including a first asymmetric graph. The photographing module is coupled to the processing module, and captures at least a part of the first projection image based on a photographing range, so as to output a first photographed image including at least one second asymmetric graph. The processing module analyzes the first photographed image to determine whether the at least one second asymmetric graph is consistent with a geometric configuration of the first asymmetric graph. The processing module determines an effective photographing area according to one of the at least one second asymmetric graph that is consistent with the geometric configuration of the first asymmetric graph in the first photographed image.
