1    package j2d.edge; 
2     
3    import j2d.ImageUtils; 
4    import ip.transforms.Kernels; 
5    import j2d.ImageProcessorInterface; 
6    import j2d.ImageProcessorFactory; 
7    import j2d.hpp.InvertFilter; 
8    import j2d.hpp.ThresholdProcessor; 
9     
10   import java.awt.*; 
11    
12    
13   public class MehrotraAndZhangProcessor 
14           implements ImageProcessorInterface, 
15           ImageProcessorFactory { 
16    
17       private int kernelWidth; 
18       private double h; 
19    
20    
21       public MehrotraAndZhangProcessor( 
22               int _kernelWidth, 
23               double _h) { 
24    
25           kernelWidth = _kernelWidth; 
26           h = _h; 
27       } 
28    
29       public ImageProcessorInterface getProcessor(int i) { 
30           return 
31                   new MehrotraAndZhangProcessor( 
32                           kernelWidth, 
33                           i); 
34       } 
35    
36       public Image process(Image img) { 
37           return MehrotraAndZhang(img); 
38    
39       } 
40    
41       private Image MehrotraAndZhang(Image img) { 
42           System.out.println( 
43                   "kw=" + kernelWidth + 
44                   " h=" + h); 
45           ThresholdProcessor thresh = new ThresholdProcessor(128); 
46           ImageProcessorInterface invert = InvertFilter.getProcessor(); 
47           Image mzImage = ImageUtils.convolution(img, 
48                   Kernels.getMehrotraAndZhangKernel( 
49                           kernelWidth, 
50                           kernelWidth, 
51                           h)); 
52    
53           mzImage = thresh.process(mzImage); 
54           mzImage = ImageUtils.convolution( 
55                   mzImage, 
56                   Kernels.getSobel()); 
57    
58    
59           return invert.process(mzImage); 
60       } 
61    
62   } 
63    
64