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-rw-r--r--src/main/java/Filter.java55
1 files changed, 26 insertions, 29 deletions
diff --git a/src/main/java/Filter.java b/src/main/java/Filter.java
index bb87287..03c8b0b 100644
--- a/src/main/java/Filter.java
+++ b/src/main/java/Filter.java
@@ -4,6 +4,23 @@
4 */ 4 */
5public final class Filter { 5public final class Filter {
6 6
7 public static final float[][] SMOOTH_CORE = new float[][]{
8 {0.1f, 0.1f, 0.1f},
9 {0.1f, 0.2f, 0.1f},
10 {0.1f, 0.1f, 0.1f}
11 };
12 public static final float[][] SOBEL_X_CORE = new float[][]{
13 {-1, 0, 1},
14 {-2, 0, 2},
15 {-1, 0, 1}
16 };
17 public static final float[][] SOBEL_Y_CORE = new float[][]{
18 {-1, -2, -1},
19 {0, 0, 0},
20 {1, 2, 1}
21 };
22
23
7 /** 24 /**
8 * Get a pixel without accessing out of bounds 25 * Get a pixel without accessing out of bounds
9 * 26 *
@@ -38,15 +55,15 @@ public final class Filter {
38 float[][] filteredImage = new float[height][width]; 55 float[][] filteredImage = new float[height][width];
39 for (int row = 0; row < height; ++row) { 56 for (int row = 0; row < height; ++row) {
40 for (int col = 0; col < width; ++col) { 57 for (int col = 0; col < width; ++col) {
41 float pixelCore[][] = { 58 float pixelNeighbors[][] = {
42 {Filter.at(gray, row-1, col-1),Filter.at(gray, row-1, col),Filter.at(gray, row-1, col+1)}, 59 {Filter.at(gray, row - 1, col - 1), Filter.at(gray, row - 1, col), Filter.at(gray, row - 1, col + 1)},
43 {Filter.at(gray, row, col-1),Filter.at(gray, row, col),Filter.at(gray, row, col+1)}, 60 {Filter.at(gray, row, col - 1), Filter.at(gray, row, col), Filter.at(gray, row, col + 1)},
44 {Filter.at(gray, row+1, col-1),Filter.at(gray, row+1, col),Filter.at(gray, row+1, col+1)} 61 {Filter.at(gray, row + 1, col - 1), Filter.at(gray, row + 1, col), Filter.at(gray, row + 1, col + 1)}
45 }; 62 };
46 63
47 for (int i = 0; i < kernel[0].length; i++) { 64 for (int i = 0; i < kernel[0].length; i++) {
48 for (int j = 0; j < kernel.length; j++) { 65 for (int j = 0; j < kernel.length; j++) {
49 filteredImage[row][col] += kernel[i][j] * pixelCore[i][j]; 66 filteredImage[row][col] += kernel[i][j] * pixelNeighbors[i][j];
50 } 67 }
51 } 68 }
52 } 69 }
@@ -62,14 +79,7 @@ public final class Filter {
62 * @return a HxW float array 79 * @return a HxW float array
63 */ 80 */
64 public static float[][] smooth(float[][] gray) { 81 public static float[][] smooth(float[][] gray) {
65 float smoothCore[][]={ 82 float[][] smoothtImage = Filter.filter(gray, SMOOTH_CORE);
66 {0.1f,0.1f,0.1f},
67 {0.1f,0.2f,0.1f},
68 {0.1f,0.1f,0.1f}
69 };
70
71 float[][] smoothtImage = Filter.filter(gray, smoothCore);
72
73 return smoothtImage; 83 return smoothtImage;
74 } 84 }
75 85
@@ -80,13 +90,7 @@ public final class Filter {
80 * @return a HxW float array 90 * @return a HxW float array
81 */ 91 */
82 public static float[][] sobelX(float[][] gray) { 92 public static float[][] sobelX(float[][] gray) {
83 float sobelXCore[][]= { 93 float[][] sobelXImage = Filter.filter(gray, SOBEL_X_CORE);
84 {-1,0,1},
85 {-2,0,2},
86 {-1,0,1}
87 };
88
89 float[][] sobelXImage = Filter.filter(gray, sobelXCore);
90 return sobelXImage; 94 return sobelXImage;
91 } 95 }
92 96
@@ -97,14 +101,7 @@ public final class Filter {
97 * @return a HxW float array 101 * @return a HxW float array
98 */ 102 */
99 public static float[][] sobelY(float[][] gray) { 103 public static float[][] sobelY(float[][] gray) {
100 float sobelYCore[][]={ 104 float[][] sobelYImage = Filter.filter(gray, SOBEL_Y_CORE);
101 {-1,-2,-1},
102 {0,0,0},
103 {1,2,1}
104 };
105
106 float[][] sobelYImage = Filter.filter(gray, sobelYCore);
107 System.out.println(sobelYImage[0][0]);
108 return sobelYImage; 105 return sobelYImage;
109 } 106 }
110 107
@@ -125,7 +122,7 @@ public final class Filter {
125 122
126 for (int row = 0; row < height; ++row) { 123 for (int row = 0; row < height; ++row) {
127 for (int col = 0; col < width; ++col) { 124 for (int col = 0; col < width; ++col) {
128 sobelImage[row][col] = (float) Math.sqrt(Math.pow(x[row][col],2)+Math.pow(y[row][col],2)); 125 sobelImage[row][col] = (float) Math.sqrt(Math.pow(x[row][col], 2) + Math.pow(y[row][col], 2));
129 } 126 }
130 } 127 }
131 128