Method of multispectral photography and protector

Claim 1

A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.

Claim 2

A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.

Claim 3

A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.

Claim 4

A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.