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Copy pathEdgeDetection.java
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Copy pathEdgeDetection.java
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executable file
·238 lines (225 loc) · 9.01 KB
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import java.awt.Color;
public class EdgeDetection
{
public static void main(String[] args)
{
In indata = new In(args[0]);
int size = 28;
double nimage[][] = new double [size][size];
double pixelenergy[][] = new double [size][size];
Picture origpicture = new Picture(5*size,5*size);
for(int i = 0; i< size; i++)
{
for(int j = 0; j < size; j++)
{
nimage[i][j] = indata.readInt();
Color color = new Color(255 - (int)(nimage[i][j]),
255 - (int)(nimage[i][j]),
255 - (int)(nimage[i][j]));
for(int x = 0; x< 5; x++)
{
for(int y = 0; y<5; y++)
{
origpicture.set(5*j+x,5*i+y, color);
}
}
}
}
origpicture.show();
///////////////////////////////////////////////////////////////////////
double xenergy = 0, yenergy = 0;
double max = -1;
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if(i == 0)
xenergy = Math.pow((nimage[i+1][j] - nimage[size-1][j]),2);
else if (i == size-1)
xenergy = Math.pow((nimage[0][j] - nimage[i-1][j]),2);
else
xenergy = Math.pow((nimage[i-1][j] - nimage[i+1][j]),2);
if(j == 0)
yenergy = Math.pow((nimage[i][j+1] - nimage[size-1][j]),2);
else if (j == size-1)
yenergy = Math.pow((nimage[i][0] - nimage[i][j-1]),2);
else
yenergy = Math.pow((nimage[i][j-1] - nimage[i][j+1]),2);
pixelenergy[i][j] = xenergy + yenergy;
if(pixelenergy[i][j] > max)
max = pixelenergy[i][j];
}
}
Picture picture = new Picture(5*size,5*size);
for(int i = 0; i< size; i++)
{
for(int j = 0; j<size; j++)
{
Color color = new Color(255 - (int)(pixelenergy[i][j] *255/max),
255 - (int)(pixelenergy[i][j] *255/max),
255 - (int)(pixelenergy[i][j] *255/max));
for(int x = 0; x< 5; x++)
{
for(int y = 0; y<5; y++)
{
picture.set(5*j+x,5*i+y, color);
}
}
}
}
picture.show();
///////////////////////////////////////////////////////////////////////
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
pixelenergy[i][j]*=255/max;
}
}
double pixelenergy2[][] = new double [size][size];
Picture picture2 = new Picture(5*size,5*size);
xenergy = 0;
yenergy = 0;
max = -1;
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if(i == 0)
xenergy = Math.pow((pixelenergy[i+1][j] - pixelenergy[size-1][j]),2);
else if (i == size-1)
xenergy = Math.pow((pixelenergy[0][j] - pixelenergy[i-1][j]),2);
else
xenergy = Math.pow((pixelenergy[i-1][j] - pixelenergy[i+1][j]),2);
if(j == 0)
yenergy = Math.pow((pixelenergy[i][j+1] - pixelenergy[size-1][j]),2);
else if (j == size-1)
yenergy = Math.pow((pixelenergy[i][0] - pixelenergy[i][j-1]),2);
else
yenergy = Math.pow((pixelenergy[i][j-1] - pixelenergy[i][j+1]),2);
pixelenergy2[i][j] = xenergy + yenergy;
if(pixelenergy2[i][j] > max)
max = pixelenergy2[i][j];
}
}
for(int i = 0; i< size; i++)
{
for(int j = 0; j<size; j++)
{
Color color = new Color(255 - (int)(pixelenergy2[i][j] *255/max),
255 - (int)(pixelenergy2[i][j] *255/max),
255 - (int)(pixelenergy2[i][j] *255/max));
for(int x = 0; x< 5; x++)
{
for(int y = 0; y<5; y++)
{
picture2.set(5*j+x,5*i+y, color);
}
}
}
}
picture2.show();
///////////////////////////////////////////////////////////////////////
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
pixelenergy2[i][j]*=255/max;
}
}
double pixelenergy3[][] = new double [size][size];
Picture picture3 = new Picture(5*size,5*size);
xenergy = 0;
yenergy = 0;
max = -1;
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if(i == 0)
xenergy = Math.pow((pixelenergy2[i+1][j] - pixelenergy2[size-1][j]),2);
else if (i == size-1)
xenergy = Math.pow((pixelenergy2[0][j] - pixelenergy2[i-1][j]),2);
else
xenergy = Math.pow((pixelenergy2[i-1][j] - pixelenergy2[i+1][j]),2);
if(j == 0)
yenergy = Math.pow((pixelenergy2[i][j+1] - pixelenergy2[size-1][j]),2);
else if (j == size-1)
yenergy = Math.pow((pixelenergy2[i][0] - pixelenergy2[i][j-1]),2);
else
yenergy = Math.pow((pixelenergy2[i][j-1] - pixelenergy2[i][j+1]),2);
pixelenergy3[i][j] = xenergy + yenergy;
if(pixelenergy3[i][j] > max)
max = pixelenergy3[i][j];
}
}
for(int i = 0; i< size; i++)
{
for(int j = 0; j<size; j++)
{
Color color = new Color(255 - (int)(pixelenergy3[i][j] *255/max),
255 - (int)(pixelenergy3[i][j] *255/max),
255 - (int)(pixelenergy3[i][j] *255/max));
for(int x = 0; x< 5; x++)
{
for(int y = 0; y<5; y++)
{
picture3.set(5*j+x,5*i+y, color);
}
}
}
}
picture3.show();
///////////////////////////////////////////////////////////////////////
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
pixelenergy3[i][j]*=255/max;
}
}
double pixelenergy4[][] = new double [size][size];
Picture picture4 = new Picture(5*size,5*size);
xenergy = 0;
yenergy = 0;
max = -1;
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if(i == 0)
xenergy = Math.pow((pixelenergy3[i+1][j] - pixelenergy3[size-1][j]),2);
else if (i == size-1)
xenergy = Math.pow((pixelenergy3[0][j] - pixelenergy3[i-1][j]),2);
else
xenergy = Math.pow((pixelenergy3[i-1][j] - pixelenergy3[i+1][j]),2);
if(j == 0)
yenergy = Math.pow((pixelenergy3[i][j+1] - pixelenergy3[size-1][j]),2);
else if (j == size-1)
yenergy = Math.pow((pixelenergy3[i][0] - pixelenergy3[i][j-1]),2);
else
yenergy = Math.pow((pixelenergy3[i][j-1] - pixelenergy3[i][j+1]),2);
pixelenergy4[i][j] = xenergy + yenergy;
if(pixelenergy4[i][j] > max)
max = pixelenergy4[i][j];
}
}
for(int i = 0; i< size; i++)
{
for(int j = 0; j<size; j++)
{
Color color = new Color(255 - (int)(pixelenergy4[i][j] *255/max),
255 - (int)(pixelenergy4[i][j] *255/max),
255 - (int)(pixelenergy4[i][j] *255/max));
for(int x = 0; x< 5; x++)
{
for(int y = 0; y<5; y++)
{
picture4.set(5*j+x,5*i+y, color);
}
}
}
}
picture4.show();
}
}
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