tidy3d.plugins.autograd.invdes.grey_indicator#
- class grey_indicator[source]#
Bases:
Calculate the grey indicator for a given array.
The grey indicator returns 1 for completely grey arrays (all 0.5) and 0 for perfectly binary arrays. It is calculated based on: Sigmund, Ole. “Morphology-based black and white filters for topology optimization.” Structural and Multidisciplinary Optimization 33 (2007): 401-424.
- Parameters:
array (NDArray) – The input array for which the grey indicator is to be calculated.
- Returns:
The calculated grey indicator.
- Return type:
float
Inherited Common Usage