Brightness.cs

private void brightnessDown(PictureBox picImp) {
  int[] RGB = new int[3];
  for (int i = 0; i <= x.Width - 1; i++) {
    for (int j = 0; j <= x.Height - 1; j++) {
      z = x.GetPixel(i, j);
      RGB[0] = (z.R) - 15;
      RGB[1] = (z.G) - 15;
      RGB[2] = (z.B) - 15;
      if (RGB[0] < 0) {
        RGB[0] = 0;
      }
      if (RGB[1] < 0) {
        RGB[1] = 0;
      }
      if (RGB[2] < 0) {
        RGB[2] = 0;
      }
      y.SetPixel(i, j, Color.FromArgb(RGB[0], RGB[1], RGB[2]));
    }
  }
  Message.setMessage(PicSave.savechange(picImp, y), "Brightness Down");
}
private void brightnessUp(PictureBox picImp) {
  int[] RGB = new int[3];
  for (int i = 0; i <= x.Width - 1; i++) {
    for (int j = 0; j <= x.Height - 1; j++) {
      z = x.GetPixel(i, j);
      RGB[0] = (z.R) + 15;
      RGB[1] = (z.G) + 15;
      RGB[2] = (z.B) + 15;
      if (RGB[0] > 255) {
        RGB[0] = 255;
      }
      if (RGB[1] > 255) {
        RGB[1] = 255;
      }
      if (RGB[2] > 255) {
        RGB[2] = 255;
      }
      y.SetPixel(i, j, Color.FromArgb(RGB[0], RGB[1], RGB[2]));
    }
  }
  Message.setMessage(PicSave.savechange(picImp, y), "Brightness Up");
}