{
/* skipping scan positions to the right and down skips one scan
position too much, because this is only the top left scan position
of totally four scan positions (plus one to the right, one to the
bottom and one to the bottom right) */
{
/* skipping scan positions to the right and down skips one scan
position too much, because this is only the top left scan position
of totally four scan positions (plus one to the right, one to the
bottom and one to the bottom right) */