Definitions for "Creases"
Goalkeeper's: Areas marked on the ice in front of each goal designed to protect the goalkeepers from interference by attacking players. Referee's: Area marked on the ice in front of the Penalty Timekeeper's seat for the use of the Referee.
Identifies enclosed areas designed for the protection of the goalkeeper and the use of the Referee in the discharge of their respective duties. The lines which designate these areas are to be considered as part of the creases.
Keywords:  sharp, distinct, fold, crack, film
A crease is defined as a distinct sharp fold-line or crack in a piece of film.