FAI Pixel Count with Sentinel 2A

Hello,

I am using an image from S2A and applied the FAI algorithm for Hu et al. (2009). A mask was build and applied for land pixels. so, I was wondering if it was possible to calculate how many FAI pixels that image has?

You can use the Statistics tool in the Analysis section. Open your image and select Statistics. There you can choose your ROI mask to calculate the statistics (number of pixels, min value, max value, average, etc) and to visualise the histogram and the percentile plots.