Patent ID: 6169571
Filing Date: 2001-01-02
Classification: H04N

Abstract:
A film scanner including a linear image sensor moveable to a scan position for scanning lines of image frames of an elongated film having interframe gaps between image frames and a series of edge perforations including a reference perforation for each image frame, comprising: (a) a rotating film gate for supporting the film in the scan position, the rotating film gate including a rotatable encoder for producing an encoder signal indicative of the position of the film as it passes through the rotating film gate; (b) a film transport mechanism for advancing the film through the rotating gate; (c) a perforation detector for producing hop and weave signals in response to detection of the reference perforation, the perforation detector being mounted relative to the scan line of the image frame located at the scan position; (d) a sensor transport assembly mounted relative to the rotating film gate and moveable in a weave direction, and including means for mounting the image sensor for movement in the weave direction; and (e) signal processing means responsive to the weave signal for causing the sensor transport assembly to move the linear image sensor in the weave direction within an interframe gap to align the linear image sensor with the image frame associated with the reference perforation, and further including means responsive to the hop signal and the encoder signal for producing a start scan signal.