pls explain the "for loops x 4"

[kenneth6]

there are two 2d array
1st one has height and width
2nd one has elHeight and elWidth
vCenter and hCenter are the center of the 2nd 2d array

I don't understand these code. Anybody understand how the 2nd array moves over the 1st array and change the value of the element pixel?? What does indRow and indCol represent??

94 /**
95 * Gets the value at a given pixel. The row and column numbering
96 * starts at zero.
97 * @param row The row-number of the pixel.
98 * @param col The column-number of the pixel.
99 * @return true if the pixel's bit is 1 otherwhise false.
100 */
101 public boolean getValueAt(int row, int col)
102 {
103 int index = row*width + col;
104 return data.get(index);
105 }
106
107
108 /**
109 * Sets the value at a given pixel as true or false (representing 1 or 0).
110 * @param row The row-number of the pixel.
111 * @param col The column-number of the pixel.
112 */
113 public void setValueAt(int row, int col, boolean value)
114 {
115 int index = row*width + col;
116 data.set(index, value);
117 }
//////////////////////////////////////////////////////////////////////////////////////////////////////////
      int indRow, indCol;
 
      for (int row = 0; row < height; row++)
      {
         for (int col = 0; col < width; col++)
         {
 
            if (image.getValueAt (row, col))
            {
 
               for (int i = 0; i < elHeight; i++)
               {
                  for (int j = 0; j < elWidth; j++)
                  {
                     indRow = row + i - vCenter;
                     indCol = col + j - hCenter;
 
                     if (rStructMatrix[i][j] == 1 &&
                         indRow >= 0 && indRow < height &&
                         indCol >= 0 && indCol < width)
                     {
                        dilatedImage.setValueAt (indRow, indCol, true);
                     }
                  }
               }
 
            }// end if
 
         }
      }
 
      return dilatedImage;
   }

[r035198x]

there are two 2d array
1st one has height and width
2nd one has elHeight and elWidth
vCenter and hCenter are the center of the 2nd 2d array

I don't understand these code. Anybody understand how the 2nd array moves over the 1st array and change the value of the element pixel?? What does indRow and indCol represent??

94 /**
95 * Gets the value at a given pixel. The row and column numbering
96 * starts at zero.
97 * @param row The row-number of the pixel.
98 * @param col The column-number of the pixel.
99 * @return true if the pixel's bit is 1 otherwhise false.
100 */
101 public boolean getValueAt(int row, int col)
102 {
103 int index = row*width + col;
104 return data.get(index);
105 }
106
107
108 /**
109 * Sets the value at a given pixel as true or false (representing 1 or 0).
110 * @param row The row-number of the pixel.
111 * @param col The column-number of the pixel.
112 */
113 public void setValueAt(int row, int col, boolean value)
114 {
115 int index = row*width + col;
116 data.set(index, value);
117 }
//////////////////////////////////////////////////////////////////////////////////////////////////////////
int indRow, indCol;
 
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
 
if (image.getValueAt (row, col))
{
 
for (int i = 0; i < elHeight; i++)
{
for (int j = 0; j < elWidth; j++)
{
indRow = row + i - vCenter;
indCol = col + j - hCenter;
 
if (rStructMatrix[i][j] == 1 &&
indRow >= 0 && indRow < height &&
indCol >= 0 && indCol < width)
{
dilatedImage.setValueAt (indRow, indCol, true);
}
}
}
 
}// end if
 
}
}
 
return dilatedImage;
}

Where did you get the code? The answers to your questions should be found where you got the code.

[hirak1984]

I think this is an incomplete code!!!

where is width defined and gets its value?
please post if I am incorrect...