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     
9    import java.awt.*; 
10    
11    
12   public class LoGProcessor 
13           implements ImageProcessorInterface, 
14           ImageProcessorFactory { 
15    
16       private int kernelWidth; 
17       private double sigma; 
18    
19    
20       public LoGProcessor( 
21               int _kernelWidth, 
22               double _sigma) { 
23    
24           kernelWidth = _kernelWidth; 
25           sigma = _sigma; 
26       } 
27    
28       public ImageProcessorInterface getProcessor(int i) { 
29           return 
30                   new LoGProcessor( 
31                           kernelWidth, 
32                           i + 1); 
33       } 
34    
35       public Image process(Image img) { 
36           return LoGSobel(img); 
37    
38       } 
39    
40    
41       private Image LoGSobel(Image img) { 
42           System.out.println( 
43                   "kw=" + kernelWidth + 
44                   " sigma=" + sigma); 
45           ImageProcessorInterface invert = InvertFilter.getProcessor(); 
46           Image logImage = ImageUtils.convolution(img, 
47                   Kernels.getLaplaceOfGaussianKernel( 
48                           kernelWidth, 
49                           kernelWidth, 
50                           sigma)); 
51           return 
52                   invert.process(logImage); 
53       } 
54    
55   } 
56    
57