I'm in a new field of research and I'm having troubles following a procedure with QGIS. I'm extremely new to all this since I'm a chemist.
The aim is to calculate the total green cover from a photo. Since this data isn't available through satellite, I have to use normal .jpg photography.
I start with raster > calculator and add in the open box this equation: BAND2(green) * 2 – BAND1(Red) – BAND3(Blue)
This comes out:
Now in the search box on the right, I'm told to search for "RECLASSIFY VALUES(SIMPLE)" but this is all that appears.
This is the reference photo I've been given of the tool that should appear:
And this is the version of QGIS I'm using
on this version of Windows.
I've installed SAGA with QGIS in this version