What is the format of an ECT permittivity image?
The permittivity distribution of a mixture of two fluids is often displayed as a series of normalised pixels located on either a (32 x 32) or (64 x 64) square pixel grid, using an appropriate colour scale to indicate the normalised pixel permittivity as shown, for example, in the figure below. This uses a graduated blue/green/red colour scale, where pixel values corresponding to the lower permittivity material used for calibration have the value zero and are shown in blue, while pixels corresponding to the higher permittivity material have the value 1 and are shown in red. The normalised permittivity distribution corresponds to the fractional concentration distribution of the higher permittivity material.
