1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkimageotsuthresholds.py,v $
## Language: Python
## Date: $Date: 2006/07/17 09:53:14 $
## Version: $Revision: 1.8 $
## Copyright (c) Luca Antiga, David Steinman. All rights reserved.
## See LICENCE file for details.
## 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 vtk
from vmtk import vtkvmtk
import sys
import pypes
vmtkimageotsuthresholds = 'vmtkImageOtsuThresholds'
class vmtkImageOtsuThresholds(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Image = None
self.NumberOfHistogramBins = 128
self.NumberOfThresholds = 1
self.LabelOffset = 0
self.OutputThresholdId = 0
self.Thresholds = None
self.Threshold = None
self.SetScriptName('vmtkimageotsuthresholds')
self.SetScriptDoc('automatically label an image using multiple Otsu thresholding')
self.SetInputMembers([
['Image','i','vtkImageData',1,'','the input image','vmtkimagereader'],
['NumberOfHistogramBins','bins','int',1,'(0,)','the number of bins to use for generating the image histogram'],
['NumberOfThresholds','thresholds','int',1,'(0,)','the number of intensity thresholds to generate for generating the labeled image'],
['OutputThresholdId','othresholdid','int',1,'(0,)','the id of the threshold to send in output'],
['LabelOffset','offset','int',1,'(0,)','the lowest label value to use while generating the labeled image']
])
self.SetOutputMembers([
['Image','o','vtkImageData',1,'','the output image','vmtkimagewriter'],
['Thresholds','othresholds','vtkFloatArray',1,'','the computed thresholds'],
['Threshold','othreshold','float',1,'','the nth computed threshold, with n set to OutputThresholdId']
])
def Execute(self):
if self.Image == None:
self.PrintError('Error: No input image.')
cast = vtk.vtkImageCast()
cast.SetInputData(self.Image)
cast.SetOutputScalarTypeToFloat()
cast.Update()
otsuFilter = vtkvmtk.vtkvmtkOtsuMultipleThresholdsImageFilter()
otsuFilter.SetInputConnection(cast.GetOutputPort())
otsuFilter.SetNumberOfHistogramBins(self.NumberOfHistogramBins)
otsuFilter.SetNumberOfThresholds(self.NumberOfThresholds)
otsuFilter.SetLabelOffset(self.LabelOffset)
otsuFilter.Update()
self.Image = otsuFilter.GetOutput()
self.Thresholds = otsuFilter.GetThresholds()
self.Threshold = self.Thresholds.GetValue(self.OutputThresholdId)
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
|
