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-rw-r--r--src/main/java/Filter.java71
1 files changed, 61 insertions, 10 deletions
diff --git a/src/main/java/Filter.java b/src/main/java/Filter.java
index 73b435b..2dd81ee 100644
--- a/src/main/java/Filter.java
+++ b/src/main/java/Filter.java
@@ -33,8 +33,26 @@ public final class Filter {
33 * @return a HxW float array 33 * @return a HxW float array
34 */ 34 */
35 public static float[][] filter(float[][] gray, float[][] kernel) { 35 public static float[][] filter(float[][] gray, float[][] kernel) {
36 // TODO filter 36 int width = gray[0].length;
37 return null; 37 int height = gray.length;
38 float[][] filteredImage = new float[height][width];
39 for (int row = 0; row < height; ++row) {
40 for (int col = 0; col < width; ++col) {
41 float pixelCore[][] = {
42 {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)},
44 {Filter.at(gray, row-1, col-1),Filter.at(gray, row-1, col),Filter.at(gray, row-1, col+1)}
45 };
46
47 for (int i = 0; i < kernel[0].length; i++) {
48 for (int j = 0; j < kernel.length; j++) {
49 filteredImage[row][col] += kernel[i][j] * pixelCore[i][j];
50 }
51 }
52 }
53 }
54
55 return filteredImage;
38 } 56 }
39 57
40 /** 58 /**
@@ -44,8 +62,15 @@ public final class Filter {
44 * @return a HxW float array 62 * @return a HxW float array
45 */ 63 */
46 public static float[][] smooth(float[][] gray) { 64 public static float[][] smooth(float[][] gray) {
47 // TODO smooth 65 float smoothCore[][]={
48 return null; 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;
49 } 74 }
50 75
51 /** 76 /**
@@ -55,8 +80,14 @@ public final class Filter {
55 * @return a HxW float array 80 * @return a HxW float array
56 */ 81 */
57 public static float[][] sobelX(float[][] gray) { 82 public static float[][] sobelX(float[][] gray) {
58 // TODO sobelX 83 float sobelXCore[][]= {
59 return null; 84 {-1,0,1},
85 {-2,0,2},
86 {-1,0,1}
87 };
88
89 float[][] sobelXImage = Filter.filter(gray, sobelXCore);
90 return sobelXImage;
60 } 91 }
61 92
62 /** 93 /**
@@ -66,8 +97,15 @@ public final class Filter {
66 * @return a HxW float array 97 * @return a HxW float array
67 */ 98 */
68 public static float[][] sobelY(float[][] gray) { 99 public static float[][] sobelY(float[][] gray) {
69 // TODO sobelY 100 float sobelYCore[][]={
70 return null; 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;
71 } 109 }
72 110
73 /** 111 /**
@@ -77,8 +115,21 @@ public final class Filter {
77 * @return a HxW float array 115 * @return a HxW float array
78 */ 116 */
79 public static float[][] sobel(float[][] gray) { 117 public static float[][] sobel(float[][] gray) {
80 // TODO sobel 118 float[][] x = Filter.sobelX(gray);
81 return null; 119 float[][] y = Filter.sobelY(gray);
120
121 int width = gray[0].length;
122 int height = gray.length;
123
124 float[][] sobelImage = new float[height][width];
125
126 for (int row = 0; row < height; ++row) {
127 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));
129 }
130 }
131
132 return sobelImage;
82 } 133 }
83 134
84} 135}