// Converting Energy Image to Black & White Image
public void generateEnergyImage()
{
int w = energyImageMat.GetLength(0);
int h = energyImageMat.GetLength(1);
energyImage = new Bitmap(w, h);
LockBitmap lockEnergy = new LockBitmap(energyImage);
lockEnergy.LockImage();
for (int i = 0; i < w; ++i)
for (int j = 0; j < h; ++j)
{
int map = 255 - (int)(energyImageMat[i, j] * 255.0);
lockEnergy.SetPixel(i, j, Color.FromArgb(map, map, map));
}
lockEnergy.UnlockImage();
}
private void computeEnergy()
{
LockBitmap lImg = new LockBitmap(userImage);
lImg.LockImage();
int w = userImage.Width;
int h = userImage.Height;
energyImageMat = new int[w, h];
int[,] tmpMat = new int[w, h];
for (int i = 0; i < w; ++i) //defining obstacles in the image (1 = obstacle || 0 = non-obstacle)
for (int j = 0; j < h; ++j)
if (colorDist(lImg.GetPixel(i, j), Settings.targetedColor) <= Settings.colorDist)
tmpMat[i, j] = 1;
else
tmpMat[i, j] = 0;
lImg.UnlockImage();
for (int i = 0; i < w; ++i) //Computing gradient magnitude
for (int j = 0; j < h; ++j)
if (tmpMat[i, j] == 1)
{
if (i == 0 || j == 0 || i == w - 1 || j == h - 1)
energyImageMat[i, j] = 1;
else
{
energyImageMat[i, j] |= (tmpMat[i, j - 1] == 0 || tmpMat[i, j + 1] == 0) ? 1 : 0;
energyImageMat[i, j] |= (tmpMat[i - 1, j] == 0 || tmpMat[i + 1, j] == 0) ? 1 : 0;
}
}
}