private void RedrawViewImage()
{
viewGraphics.Clear(Color.Transparent);
viewGraphics.DrawImage(image, new Rectangle(0, 0, image.Width, image.Height));
for (int i = 0; i < rectangles.Length; i++)
viewGraphics.DrawRectangle(i == SelectedIndex ? selectedPen : unselectedPen, rectangles[i]);
pictureBox.Refresh();
}