Clipping is procedure for identifying sections of an image that are either inside or outside of a region. This region is known as clipping window.
Point Clipping: Points are considered to be interior of clipping window if XwMIN ≤ X ≤ XwMAX and YwMIN ≤ Y ≤ YwMAX
Line Clipping: Lines are considered to be interior of clipping window if both end points are interior of window. For example line P1P2.