Fig. 1. Schematic diagram of sample diffraction experiment (a) Ideal experimental state, (b) Real experimental state

Fig. 2. Diffraction pattern of I-2θ before calibration

Fig. 3. Geometry used in pyFAI

Fig. 4. Illustration of calibration interface

Fig. 5. Comparison of calibration accuracy (a) Accurate calibration, (b) Inaccurate calibration

Fig. 6. Interface diagram of integral result

Fig. 7. Comparison of I-2θ data among uncalibrated, FIT2D, Dioptas and Corona after integrated (color online)