The magnitude is normally computed as the square root of the sum of each data element squared. If the input lattice has 3 components data values and Norm Type is set to "Luminance", the lattice is interpreted as an RGB image, and the standard NTSC luminance is computed
I = 0.299*Red + 0.587*Green + 0.114*BlueIf the input lattice doesn't have 3 components, Norm Type is set to "Magnitude" and the normal magnitude is output.
The input data lattice
Port: Norm Type
Type: Radio Box
Menu Item: Magnitude
Menu Item: Luminance
Selects magnitude or luminance Output
Magnitude of the input lattice.