→How it works
Use imageJ’s circle tool (shift + oval tool) to measure the spot/ring patterns concentric to the (000) direct beam. From the area measurement, the radius (G) is found. From G = 1/d in reciprocal space, the d-spacing is calculated for each measurement made. This plugin has three different modes in which it can operate.
The first, and most basic mode, is '''calculate''' where the calculated values for G and d are added to the imageJ Results window in new columns. G is in nanometers and d is in Angstroms. There is also a 2% error column, which is just 2 % of d in angstroms.