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AssigneeRank Cintel Limited
InventorsTerence W. Mead, Richard T. Such
Estimating the term…
A film instability compensating system compensates for the effects of film instability in a film gate. The film instability compensation system includes a positional transducer for measuring the position of the film edge relative to a sprocket hole which is maintained in contact with a sprocket tooth by a pressure roller. The positional transducer measures the distance between the film edge and a sprocket hole and then measures deviations from the distance for subsequent sprocket holes to determine a compensation signal. The output of the positional transducer is coupled to a delay unit which delays the signal corresponding to the error at a particular sprocket hole until that sprocket hole reaches the film gate. Signals representative of the cyclic errors caused by the relative lateral displacement of the sprocket holes, are stored in a memory and are applied to a subtractor circuit. In the subtractor circuit, the compensation signal from the output of a pipeline register delay is adjusted to compensate for cyclic errors, and to provide an overall compensation signal which is applied to the horizontal scan shift when the appropriate sprocket hole reaches the film gate.
Apparatus for compensating for film instability in an image converter for converting images recorded on film to images represented by video signals, said image converter having flying spot scanner means for scanning with a flying spot said images recorded on film at a scanning location as the film moves past said scanning location, and scan generation means for generating a scan pattern for said flying spot, and said film having a plurality of sprocket holes and a film edge, said compensating apparatus comprising:
A method of compensating for film instability in an image converter for converting images recorded on film to images represented by video signals, said image converter having a flying spot scanner for scanning with a flying spot said images recorded on film at a scanning location as the film moves past said scanning location, and a scan generator for generating a scan pattern for said flying spot, and said film having a plurality of sprocket holes and a film edge, said method comprising the steps of:
An apparatus for compensating for film registration weave for use with a film scanner, the film scanner including a flying spot scanner for scanning at a scanning location images recorded on a film and a scan generator for generating a scan pattern for the flying spot scanner, the film having a plurality of sprocket holes and a film edge, said apparatus comprising:
Dependencies are inferred from the claim text.