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Figure 3
Oxygen element distribution maps based on the thresholds calculated by the two methods: (a) the new ratio method and (b) the traditional KES method. The bright white pixels contain oxygen. The scale of the two images is 13 µm × 13 µm or 261 × 261 pixels. The black and white frames indicate where significant differences exist between the two images: the fine dot distribution of oxygen is evident using the ratio method, but it is missing in results from the traditional subtraction method (white frames); the noise in the subtraction method is discarded by the ratio method (black frames).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 17| Part 6| September 2010| Pages 804-809
doi:10.1107/S0909049510031250
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