#!/usr/bin/env python

#==========================================================================
#
#   Copyright Insight Software Consortium
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#          http://www.apache.org/licenses/LICENSE-2.0.txt
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
#==========================================================================*/

#
#  Test GrayscaleErodeImageFilter
#

import sys
import itk
itk.auto_progress(2)

inputImage = sys.argv[1]
outputImage = sys.argv[2]
radiusValue = int(sys.argv[3])

PixelType = itk.UC
Dimension = 2

ImageType = itk.Image[PixelType, Dimension]

ReaderType = itk.ImageFileReader[ImageType]
reader = ReaderType.New()
reader.SetFileName(inputImage)

StructuringElementType = itk.FlatStructuringElement[Dimension]
structuringElement = StructuringElementType.Ball(radiusValue)

GrayscaleFilterType = itk.GrayscaleErodeImageFilter[
    ImageType, ImageType, StructuringElementType]
grayscaleFilter = GrayscaleFilterType.New()
grayscaleFilter.SetInput(reader.GetOutput())
grayscaleFilter.SetKernel(structuringElement)

WriterType = itk.ImageFileWriter[ImageType]
writer = WriterType.New()
writer.SetFileName(outputImage)
writer.SetInput(grayscaleFilter.GetOutput())

writer.Update()
