3.7

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   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", InputFile="Mask-PG3-19884.xml")

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

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

Output:

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

Categories: Algorithms | Transforms\Masking

Source

C++ source: InvertMask.cpp

C++ header: InvertMask.h