#==============================================================================
#
# Project:   SharpImage
# Module:    MorphologicalErode.py
# Language:  IronPython
# Author:    Dan Mueller
# Date:      $Date$
# Revision:  $Revision$
#
# 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 Morphology library
clr.AddReference("ManagedITK.FastMorphologicalFilters")
from itk import *

class FastMorphologicalErodeScript(ImageToImageScriptObject):
    # -------------------------------------------------------------------------
    Name = "FastMorphologicalErode"
    Help = """Computes the fast grayscale morphological erosion of an image.
              This script takes the minimum of all pixels within a given structuring
              element."""
    Parameters = """(itkSize) KernelRadius = the radius of the ball. (itkSize(1,1,.))
                    (itkFlatStructuringElement) Kernel = the structuring element. (Box)
                    (FastMorphologyEnum) Algorithm = Basic, Histogram, Anchor, or VHGW. (VHGW)"""
    KernelRadius = None
    Kernel = None
    Algorithm = FastMorphologyEnum.VHGW
    # -------------------------------------------------------------------------

    def ThreadedDoWork(self):
        """ Perform the main functions of the script on a background thread. """
        try:
            self.StartedWork()
            self.WriteInputName()
            filterErode = itkGrayscaleErodeImageFilter.New( self.Input, self.Output )
            self.AddEventHandlersToProcessObject( filterErode )
            filterErode.SetInput( self.Input )
            if (self.KernelRadius == None):
                self.KernelRadius = itkSize( self.Input.Dimension )
                self.KernelRadius.Fill( 1 )
            if (self.Kernel == None):
                self.Kernel = itkFlatStructuringElement.Box( self.KernelRadius );
            filterErode.Kernel = self.Kernel
            filterErode.Algorithm = self.Algorithm
            self.WriteLineToConsole( "Kernel=" + self.Kernel.ToString() )
            self.WriteLineToConsole( "Algorithm=" + self.Algorithm.ToString() )
            filterErode.UpdateLargestPossibleRegion()
            filterErode.GetOutput( self.Output )
            self.DisconnectInputAndOutput()
            self.DisposeOfObject( filterErode )
            self.WriteOutputName()
            self.FinishedWork( True )
        except Exception, ex:
            self.HandleException( ex )
            self.FinishedWork( False )
            self.Finalise( )