4.2

InvertMask v1

../_images/InvertMask-v1_dlg.png

InvertMask dialog.

Summary

This algorithm inverts every mask bit in a MaskWorkspace.

Properties

Name Direction Type Default Description
InputWorkspace Input MaskWorkspace Mandatory MaskWorkspace to be inverted.
OutputWorkspace Output MaskWorkspace AnonynmousOutput MaskWorkspace has inverted bits from input MaskWorkspace.

Description

A NOT operation will be conducted on the input masking workspace (SpecialWorkspace2D).

Output

A SpecialWorkspace2D with the same dimension and geometry as the input two SpecialWorkspace2D.

Usage

Example - invert a POWGEN mask:

# Load data
maskws = LoadMask(Instrument="POWGEN_Definition_2015-08-01.xml",
                  InputFile="Mask-PG3-19884.xml")

# Check source mask workspace
nummasked = 0
for i in range(maskws.getNumberHistograms()):
  if maskws.readY(i)[0] > 0.5:
    nummasked += 1

# Invert mask
invmaskws = InvertMask(InputWorkspace=maskws)

# Check target mask workspace
nummasked2 = 0
for i in range(invmaskws.getNumberHistograms()):
  if invmaskws.readY(i)[0] > 0.5:
    nummasked2 += 1

# Print out
print("Number of histogram:  {}".format(maskws.getNumberHistograms()))
print("Source Mask workspace # Detectors masked =  {}".format(nummasked))
print("Source Mask workspace # Detectors masked =  {}".format(nummasked2))

Output:

Number of histogram:  33418
Source Mask workspace # Detectors masked =  82
Source Mask workspace # Detectors masked =  33336

Categories: AlgorithmIndex | Transforms\Masking

Source

C++ source: InvertMask.cpp (last modified: 2019-06-04)

C++ header: InvertMask.h (last modified: 2018-10-05)