Density.core_mask

Density.core_mask()

Calculates a weighted core mask by performing iterative binary erosion on Density.data. In each iteration, all mask elements corresponding to a non-zero data elemnt are incremented by one. Therefore, a mask element with value N corresponds to a data value that remained non-zero for N iterations. Mask elements with high values are likely part of the core density [1].

Returns:

NDArray

Core-weighted mask with shape of Density.data.

References

[1]

Gydo Zundert and Alexandre Bonvin. Fast and sensitive rigid-body fitting into cryo-em density maps with powerfit. AIMS Biophysics, 2:73–87, 04 2015. doi:10.3934/biophy.2015.2.73