private void displacementSelector_PictureClicked(PictureAndThumbnailPair e)
{
WebcamWithPreview camp = confWebcam.SelectedItem as WebcamWithPreview;
if ((m_takePictureWithPreviewAsync != null) && (camp != null)) {
camp.DisplacementMap = e.Picture.Length == 0 ? null : new Bitmap(e.Picture);
}
}