Figure 5.

Comparison of the matrix algorithm and the presented algorithm. This figure shows the result of a subtraction of images obtained using the two algorithms. Note that the local differences are caused only by relatively high noise of present long-range system z scanner and slight mismatch between the two images (due to a slight shift caused by retract and approach between the two measurements, the images had to be cropped and aligned manually).

Klapetek et al. Nanoscale Research Letters 2012 7:213   doi:10.1186/1556-276X-7-213
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