Apparatus and method for spatially stabilizing projected or viewed images with a locating symbol position detection
OwnerJ. Carl Cooperinventor
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Abstract
The present disclosure teaches a method and apparatus for use in stabilizing images. The invention operates to sense the position of a locating symbol having a known relationship to the image to be stabilized, compare the position of the locating symbol to a reference to determine a displacement value responsive thereto and changing a correction element located in the conveyance path of the image in response to the displacement value to cause a compensating displacement of the image. The invention is particularly useful in reducing gate weave in film projectors.
Claims12
Apparatus for stabilizing an image including in combination:
- a) a position sense section responsive to a locating symbol having a known spatial relationship to said image to sense the position thereof, and;
- b) a correction section responsive to said position sense section and operable to alter the position of said image in order to improve the stability of said image.
Apparatus for reducing unwanted movement of an image carried by a medium and conveyed by light from said medium to a viewing location said medium including a locating symbol having a known spatial relationship to said image, said apparatus including in combination:
- a) a position sense section for sensing the position of said locating symbol relative to a known position, and;
- b) a correction section for altering the path of said light which conveys said image in order to reduce movement of said image.
An improvement for a film projector for reducing gate weave in the projected image wherein the film carrying said image includes at least one locating symbol having a known position with respect to each frame of said image including in combination:
- a) a position sensing section responsive to said locating symbol to determine the position thereof with respect to a known reference and to provide at least one displacement signal indicating said position, and;
- b) a correction section coupled to said position circuitry and operating to refract light conveying said image in response thereto in order to improve the spatial stability of said image.
A method for stabilizing an image including the steps of:
- a) sensing a locating symbol having a known spatial relationship to said image to sense the position thereof, and;
- b) altering the position of said image in response to said position thereby improving the stability of said image.
A method for reducing unwanted movement of an image carried by a medium and conveyed by light from said medium to a viewing location said medium including a locating symbol having a known spatial relationship to said image, said method including the steps of:
- a) sensing the position of said locating symbol relative to a known position, and;
- b) in response to step a) altering the path of said light which conveys said image in order to reduce movement of said image.
A method of reducing gate weave in the projected image of a film projection wherein the film carrying said image includes at least one locating symbol having a known position with respect to each frame of said image including the steps of:
- a) sensing the position of said locating symbol relative to a known reference to determine the position thereof and to provide at least one displacement measure indicating said position, and;
- b) in response to said displacement measure of step a) refracting the light conveying said image in thereby improving the spatial stability of said image.
Dependencies are inferred from the claim text.