rip.processing.filters.robinson source code

1 module rip.processing.filters.robinson;
2 
3 private
4 {
5   import rip.processing.filters.directions;
6   import rip.processing.filters.linear;
7 }
8 
9 
10 class RobinsonOperator : LinearFilter
11 {
12 	this(CardinalDirection direction)
13 	{
14 		apertureWidth = 3;
15 		apertureHeight = 3;
16 		apertureDivider = 1.0f;
17 		apertureOffset = 0.0f;
18 
19 		final switch (direction) with (CardinalDirection)
20 		{
21 			case NORTH:
22 				flattenKernel = flatten(
23 					[
24 						[ -1.0f,   0.0f,  1.0f ],
25 						[ -2.0f,   0.0f,  2.0f ],
26 						[ -1.0f,   0.0f,  1.0f ],
27 					]
28 					);
29 				break;
30 
31 			case NORTH_WEST:
32 				flattenKernel = flatten(
33 					[
34 						[  0.0f,   1.0f,   2.0f ],
35 						[ -1.0f,   0.0f,   1.0f ],
36 						[ -2.0f,  -1.0f,   0.0f ],
37 					]
38 					);
39 				break;
40 
41 			case WEST:
42 				flattenKernel = flatten(
43 					[
44 						[  1.0f,   2.0f,   1.0f ],
45 						[  0.0f,   0.0f,   0.0f ],
46 						[ -1.0f,  -2.0f,  -1.0f ],
47 					]
48 					);
49 				break;
50 
51 			case SOUTH_WEST:
52 				flattenKernel = flatten(
53 					[
54 						[  2.0f,   1.0f,   0.0f ],
55 						[  1.0f,   0.0f,  -1.0f ],
56 						[  0.0f,  -1.0f,  -2.0f ],
57 					]
58 					);
59 				break;
60 
61 			case SOUTH:
62 				flattenKernel = flatten(
63 					[
64 						[  1.0f,   0.0f,  -1.0f ],
65 						[  2.0f,   0.0f,  -2.0f ],
66 						[  1.0f,   0.0f,  -1.0f ],
67 					]
68 					);
69 				break;
70 
71 			case SOUTH_EAST:
72 				flattenKernel = flatten(
73 					[
74 						[  0.0f,  -1.0f,  -2.0f ],
75 						[  1.0f,   0.0f,  -1.0f ],
76 						[  2.0f,   1.0f,   0.0f ],
77 					]
78 					);
79 				break;
80 
81 			case EAST:
82 				flattenKernel = flatten(
83 					[
84 						[ -1.0f,  -2.0f,  -1.0f ],
85 						[  0.0f,   0.0f,   0.0f ],
86 						[  1.0f,   2.0f,   1.0f ],
87 					]
88 					);
89 				break;
90 
91 			case NORTH_EAST:
92 				flattenKernel = flatten(
93 					[
94 						[ -2.0f,  -1.0f,   0.0f ],
95 						[ -1.0f,   0.0f,   1.0f ],
96 						[  0.0f,   1.0f,   2.0f ],
97 					]
98 					);
99 				break;
100 		}
101 	}
102 }