Fig. 4
From: Use of GOCI-II images for detection of harmful algal blooms in the East China Sea
Bloom detection results (a–d) \(P.donghaiense\), (e–h) \(C.curvisetus\), and (i–l) \(A.sanguinea\) using four methods: RI > 2.8, SS(510) < 0, LHR > 0.6, and \({R}_{AB}>1.25\) from GOCI-II imagery on June 7, September 1 and September 21, 2021, respectively. Black rectangles, circles, and triangles represent the \(P.donghaiense\), \(C.curvisetus\), and \(A.sanguinea\) blooms, respectively