Coordinate rotation is one of the methods to separate sun glitter image and water-leaving image. See session 3.2 and 3.3 in: Yan Li, Jianyu Hu, Jing Li, Bin Fu and Liming Ma, 2002, Optical image modulation above the submarine bottom topography: a case study on the Taiwan Banks, China. SPIE CODE NUMBER: 4892-61. AE102, SPIE’s Third International Asia-pacific Environmental Remote Sensing Symposium 2002, Hangzhou, China