The result of the conversion is still a triple of intensity values.
Just as with digital still photography, an intensity value that is outside the allowed range of values in any one channel causes clipping.
For example, the scanner has a measurement limit below which intensity values cannot be trusted.
The difference between a pixel's intensity value and the region's mean, , is used as a measure of similarity.
The ground motion levels and descriptions associated with each intensity value are based on recent damaging earthquakes.
This local background is subtracted from the intensity values of each probe cell in all sectors.
Data gathered from people who have experienced the quake are used to determine an intensity value for their location.
Occasionally, the normalization constant does not cover well for all intensity values.
The end result is a plot showing an intensity value for each pair of frequency variables.
In both cases an average over a large number of statistically independent intensity values is obtained, allowing a much faster data acquisition time.