#==============================================================================
#
# Project:   SharpImage
# Module:    Sigmoid.py
# Language:  IronPython
# Author:    Dan Mueller
# Date:      $Date: 2007-07-06 10:57:00 +1000 (Fri, 06 Jul 2007) $
# Revision:  $Revision: 2 $
#
# Copyright (c) Queensland University of Technology (QUT) 2007.
# All rights reserved.
#
# This software is distributed WITHOUT ANY WARRANTY; without even
# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE.  See the above copyright notices for more information.
#
#==============================================================================

# Import the base script class
import ImageToImageScript
from ImageToImageScript import *

# Add reference and import Intensity library
clr.AddReference("ManagedITK.IntensityFilters")
from itk import *

class SigmoidScript(ImageToImageScriptObject):
    # -------------------------------------------------------------------------
    Name = "Sigmoid"
    Help = """Applies the linear sigmoid transform function to each pixel."""
    Parameters = """(double) Alpha = the alpha value. (1.0)
                    (double) Beta = the beta value. (0.0)
                    (pixel) OutputMinimum = the output image minimum. (0.0)
                    (pixel) OutputMaximum = the output image maximum. (255.0)"""
    OutputMinimum = 0.0
    OutputMaximum = 255.0
    Alpha = 1.0
    Beta  = 0.0
    # -------------------------------------------------------------------------

    def ThreadedDoWork(self):
        """ Perform the main functions of the script. """
        """ NOTE: This function is invoked on a background thread. """
        try:
            self.StartedWork()
            self.WriteInputName()
            filterSigmoid = itkSigmoidImageFilter.New( self.Input, self.Output )
            self.AddEventHandlersToProcessObject( filterSigmoid )
            filterSigmoid.SetInput( self.Input )
            filterSigmoid.Alpha = self.Alpha
            filterSigmoid.Beta = self.Beta
            pixelOutputMinimum = itkPixel( self.Output.PixelType, self.OutputMinimum )
            pixelOutputMaximum = itkPixel( self.Output.PixelType, self.OutputMaximum )
            filterSigmoid.OutputMinimum = pixelOutputMinimum
            filterSigmoid.OutputMaximum = pixelOutputMaximum
            self.WriteLineToConsole( "Alpha=" + self.Alpha.ToString() )
            self.WriteLineToConsole( "Beta=" + self.Beta.ToString() )
            self.WriteLineToConsole( "OutputMinimum=" + pixelOutputMinimum.ToString() )
            self.WriteLineToConsole( "OutputMaximum=" + pixelOutputMaximum.ToString() )
            filterSigmoid.UpdateLargestPossibleRegion()
            filterSigmoid.GetOutput( self.Output )
            self.DisconnectInputAndOutput()
            self.DisposeOfObject( filterSigmoid )
            self.WriteOutputName()
            self.FinishedWork( True )
        except Exception, ex:
            self.HandleException( ex )
            self.FinishedWork( False )
            self.Finalise( )