I need to calculate standard deviation RGB image characteristics. I need to calculatie Green standard deviation and Blue Standard deviation. How can I do this? I tryed to write something like this but I don't understand why this code doesn't work/ file = Import["D:\Mathematica\1.jpg"];(open filr) imagedata = ImageData[file]; array = ImageData[file]; totalSKO = StandardDeviation[array[[all, , ]]]