From f34f95c31268608b08792df15d1fdd87fccc74eb Mon Sep 17 00:00:00 2001
From: Timothée Floure
Date: Thu, 15 Oct 2015 15:14:54 +0200
Subject: Clean up

---
 src/main/java/Filter.java | 55 ++++++++++++++++++++++-------------------------
 1 file 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 @@
  */
 public final class Filter {
 
+    public static final float[][] SMOOTH_CORE = new float[][]{
+            {0.1f, 0.1f, 0.1f},
+            {0.1f, 0.2f, 0.1f},
+            {0.1f, 0.1f, 0.1f}
+    };
+    public static final float[][] SOBEL_X_CORE = new float[][]{
+            {-1, 0, 1},
+            {-2, 0, 2},
+            {-1, 0, 1}
+    };
+    public static final float[][] SOBEL_Y_CORE = new float[][]{
+            {-1, -2, -1},
+            {0, 0, 0},
+            {1, 2, 1}
+    };
+
+
     /**
      * Get a pixel without accessing out of bounds
      *
@@ -38,15 +55,15 @@ public final class Filter {
         float[][] filteredImage = new float[height][width];
         for (int row = 0; row < height; ++row) {
             for (int col = 0; col < width; ++col) {
-                float pixelCore[][] = {
-                        {Filter.at(gray, row-1, col-1),Filter.at(gray, row-1, col),Filter.at(gray, row-1, col+1)},
-                        {Filter.at(gray, row, col-1),Filter.at(gray, row, col),Filter.at(gray, row, col+1)},
-                        {Filter.at(gray, row+1, col-1),Filter.at(gray, row+1, col),Filter.at(gray, row+1, col+1)}
+                float pixelNeighbors[][] = {
+                        {Filter.at(gray, row - 1, col - 1), Filter.at(gray, row - 1, col), Filter.at(gray, row - 1, col + 1)},
+                        {Filter.at(gray, row, col - 1), Filter.at(gray, row, col), Filter.at(gray, row, col + 1)},
+                        {Filter.at(gray, row + 1, col - 1), Filter.at(gray, row + 1, col), Filter.at(gray, row + 1, col + 1)}
                 };
 
                 for (int i = 0; i < kernel[0].length; i++) {
                     for (int j = 0; j < kernel.length; j++) {
-                        filteredImage[row][col] += kernel[i][j] * pixelCore[i][j];
+                        filteredImage[row][col] += kernel[i][j] * pixelNeighbors[i][j];
                     }
                 }
             }
@@ -62,14 +79,7 @@ public final class Filter {
      * @return a HxW float array
      */
     public static float[][] smooth(float[][] gray) {
-        float smoothCore[][]={
-                {0.1f,0.1f,0.1f},
-                {0.1f,0.2f,0.1f},
-                {0.1f,0.1f,0.1f}
-        };
-
-        float[][] smoothtImage = Filter.filter(gray, smoothCore);
-
+        float[][] smoothtImage = Filter.filter(gray, SMOOTH_CORE);
         return smoothtImage;
     }
 
@@ -80,13 +90,7 @@ public final class Filter {
      * @return a HxW float array
      */
     public static float[][] sobelX(float[][] gray) {
-        float sobelXCore[][]= {
-                {-1,0,1},
-                {-2,0,2},
-                {-1,0,1}
-        };
-
-        float[][] sobelXImage = Filter.filter(gray, sobelXCore);
+        float[][] sobelXImage = Filter.filter(gray, SOBEL_X_CORE);
         return sobelXImage;
     }
 
@@ -97,14 +101,7 @@ public final class Filter {
      * @return a HxW float array
      */
     public static float[][] sobelY(float[][] gray) {
-        float sobelYCore[][]={
-                {-1,-2,-1},
-                {0,0,0},
-                {1,2,1}
-        };
-
-        float[][] sobelYImage = Filter.filter(gray, sobelYCore);
-        System.out.println(sobelYImage[0][0]);
+        float[][] sobelYImage = Filter.filter(gray, SOBEL_Y_CORE);
         return sobelYImage;
     }
 
@@ -125,7 +122,7 @@ public final class Filter {
 
         for (int row = 0; row < height; ++row) {
             for (int col = 0; col < width; ++col) {
-                sobelImage[row][col] = (float) Math.sqrt(Math.pow(x[row][col],2)+Math.pow(y[row][col],2));
+                sobelImage[row][col] = (float) Math.sqrt(Math.pow(x[row][col], 2) + Math.pow(y[row][col], 2));
             }
         }
 
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