If there is significant nonlinearity, it can be corrected with a suitable grayscale
transformation (Chapter 6). This can be done as a batch job after the digitizing
session is finished.
3.8.2.5 Distortion
The degree of geometric distortion in a particular microscope configuration can
be measured with a calibration grid target. If it is significant, one can use
a geometric transformation to correct it in each digitized image (Chapter 5).
This can be done as a batch job after the digitizing session is complete.
3.9 Summary of Important Points
1. Aliasing results when the sample spacing is greater than one-half the
period of a sinusoidal component.
2. Aliasing reduces the frequency of sinusoidal components.
3. The system OTF sets an upper limit on the frequencies ...