Fig. 2: Recalibration of L1 reduced data to remove artifacts.
From: A data reduction and compression description for high throughput time-resolved electron microscopy
Panels a and b are Fourier transforms (FT) of summed L1 reduced frames of HRTEM movies of a molybdenum disulfide 2-D crystal, acquired using a JEOL 2200 microscope operating at 200 keV and a DE-16 detector running at 300 fps, with a pixel resolution of 0.2□ (a) is L1 reduced using fast on-the-fly calibration using a 3□ threshold (see “Methods” section) (b) is the result of recalibrating (a) with a more stringent fine calibration that uses an area threshold and a 4□ threshold (see “Methods” section). The Fourier peaks indicated with orange arrows in a are due to detector artifacts, which are not readily visible in the image but can severely impact drift correction. a and b are the sum of FFTs of 9000 frames.
