protected void si_S2I3ImagePicked(object sender, EventArgs e)
{
OSAEImageManager imgMgr = new OSAEImageManager();
State2Img3 = imgMgr.GetImage((int)sender);
imgState2Img3.Source = LoadImage(State2Img3.Data);
imgState2Img3.ToolTip = "Width:" + imgState2Img3.Width + " Height:" + imgState2Img3.Height;
Validate_Initial_Coordinates();
btnLoadS2I4.IsEnabled = true;
imgState2Img4.IsEnabled = true;
}