1. An image correction method comprising: providing a plurality of temporally consecutive image frames comprising odd image frames and even image frames; alternately inserting a reference pattern and an offset pattern into the consecutive image frames and either inserting the reference pattern into the even image frames when the offset pattern is inserted into the odd image frames or inserting the offset pattern into the even image frames when the reference pattern is inserted into the odd image frames, wherein the reference pattern comprises color information of a first color space and the offset pattern comprises color information of a second color space, the first and second color spaces being different color spaces; detecting a pattern image based on the consecutive image frames into which the reference pattern and the offset pattern have been alternately inserted; and correcting a projected image frame based on the detecting.