Figure 2
(a) Histogram of the number of peaks per collapsed frame, which is the sum of 100 successive frames in the raw data. A patch with more than two connected pixels and an average of no less than two photons per pixel is identified as a peak. (b) A random selection of the collapsed frames, with identified peaks marked with blue circles. The cross denotes the beam center, and the resolution at the upper right corner is about 2 Å. |