Color encoding system utilizing two filters alternately for minimizing effects of image misregistration and image pickup device lag

Claim 1

A film recording system in which successive image-bearing frames of color motion picture film are color encoded by a spatial color encoding filter assembly onto black and white panchromatic film disposed in an optical path of said filter assembly for forming black and white images thereon comprising: first and second spatial color-encoding stripe filters disposed between said color motion picture film and said black and white panchromatic film, each of said filters having a pattern of stripes for encoding said colored light, corresponding stripes of each of said filters being disposed at equal and opposite angles measured from a reference line in the plane of said filters; and means for alternately moving said first and second filters into the optical path of said film system for encoding successive film frame images.

Claim 3

A system for encoding colored light from a scene onto black and white panchromatic film for forming a monochromatic recording thereon, comprising: striped spatial color-encoding filter means disposed along an optical path between said scene and said film for encoding colored light from said scene onto said black and white panchromatic film, said color-encoding filter means including first and second color-encoding filters, each filter having a pattern of stripes for encoding at least two component colors and a brightness component of said scene, corresponding stripes of each of said filters being disposed at equal angles extending in opposite directions measured from a reference line in the plane of said filters; and means for alternately moving said first and second filters into said optical path for encoding successive images of said scene onto said film.

Claim 4

A system for encoding colored light from a scene onto black and white panchromatic film for forming a monochromatic recording thereon, comprising: striped spatial color-encoding filter means disposed along an optical path between said scene and said film for encoding colored light from said scene onto said black and white panchromatic film, said color-encoding filter means including first and second color-encoding filters, each filter having a pattern of stripes for encoding at least two component colors and a brightness component of said scene, corresponding stripes of each of said filters being disposed at equal angles extending in opposite directions measured from a reference line in the plane of said filters; and means for alternately moving said first and second filters into said optical path for encoding successive images of said scene onto said film.

Claim 9

A system for producing color representative video signals and a brightness signal from monochromatic motion picture film containing successive frames of encoded color representative images of a colored scene, said monochromatic color representative images being encoded on first frames of said film by a first spatial striped color-encoding filter and on second frames of said film alternating with said first frames by a second spatial striped color-encoding filter, said filters having corresponding sets of encoding stripes of different colors for encoding a plurality of colors, a set of stripes of said first filter for encoding a particular color being disposed at an angle measured in one direction from a reference line and a corresponding set of stripes of said second filter being disposed at said same angle measured in the other direction from said reference line, comprising: a light source; means for directing light from said source to illuminate said monochromatic film recording and to focus said film images onto a photosensitive electrode of an image pickup tube; means coupled to said pickup tube for deriving a signal representative of the brightness of said scene; means coupled to said pickup tube for deriving signals representative of the colors of said scene; means coupled to said brightness signal and said color representative signals for producing first and second color difference signals representative of said color of said encoded images; and electron beam wobbling means coupled to said image pickup tube for wobbling electron beam of said tube vertically over several horizontal scanning lines for averaging the signals derived therefrom.

Claim 10

A system for producing color representative video signals and a brightness signal from monochromatic motion picture film containing successive frames of encoded color representative images of a colored scene, said monochromatic color representative images being encoded on first frames of said film by a first spatial striped color-encoding filter and on second frames of said film alternating with said first frames by a second spatial striped color-encoding filter, said filters having corresponding sets of encoding stripes of different colors for encoding a plurality of colors, a set of stripes of said first filter for encoding a particular color being disposed at an angle measured in one direction from a reference line and a corresponding set of stripes of said second filter being disposed at said same angle measured in the other direction from said reference line, comprising: a light source; means for directing light from said source to illuminate said monochromatic film recording and to focus said film images onto a photosensitive electrode of an image pickup tube; means coupled to said pickup tube for deriving a signal representative of the brightness of said scene; means coupled to said pickup tube for deriving signals representative of the colors of said scene; means coupled to said brightness signal and said color representative signals for producing first and second color difference signals representative of said color of said encoded images; and electron beam wobbling means coupled to said image pickup tube for wobbling electron beam of said tube vertically over several horizontal scanning lines for averaging the signals derived therefrom.