Abstract: A system and method are provided for parsing a digital video sequence, having a series of frames, into at least one segment including frames having a same camera motion quality category, selected from a predetermined list of possible camera motion quality categories. The method includes obtaining, for each of the frames, at least three pieces of information representative of the motion in the frame. The information includes: translational motion information, representative of translational motion in the frame; rotational motion information, representative of rotational motion in the frame; and scale motion information, representative of scale motion in the frame. The method further includes processing the at least three pieces of information representative of the motion in the frame, to attribute one of the camera motion quality categories to each of the frames.

Abstract: At least one of the scroll members is composed of a metallic insert having substantial the same configuration of the scroll member, i.e. an end plate and spiral wraps fixed to and extended from the end plate. The metallic insert has anchor holes and connecting holes for bonding the plastic coating layer on to the metallic insert. The anchor holes also serve as gas escaping passages during injection molding process. The mold has multiple poring gates to minimize the pressure gradients across the spiral wraps during the injection molding process. The metallic insert has also tubers sticking out from the tip of its spiral wraps. The tubers are firmly held by the mold in the injection molding process to prevent movement of the spiral wraps under the pressure from the injected plastic flow. The metallic inserts can be fully or partially coated by the plastic compound such that there is no metallic to metallic contact between the scroll members during operations.