11 November 2014 14 5K Report

I have photographs of plots and I would like to determine the plant ground-cover. I was able to convert the image into a grayscale image, the plant material is black and the soil is white. I also made sure the image is 8-bit. I am now trying to perform a black/white ratio with imageJ, but I cannot seem to do this. I am new to imageJ, any help is very much appreciated.

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