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US 4,536,848 AGranted
Method and apparatus for colored computer graphic photography
AssigneePolaroid Corporation
InventorsAlice M. d'Entremont, William T. Freeman
Life of this patent
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Abstract
Method and apparatus for making and photographing computer graphic colored images by defining each computer graphic colored image as a plurality of constant color pixel groups, assigning one of a preselected number of colors to each constant color pixel group, and exposing a photosensitive material to each constant color pixel group displayed in a predetermined ordered sequence and color.
Claims13
A method for defining and photographing an image comprising the steps of:
- defining and storing within a computer memory the image to be photographed as a plurality of constant color pixel groups;
- determining the time during which a selected photosensitive material must be exposed to a selected light color and intensity for each of said constant color pixel groups;
- ordering said determined exposure times for each of said constant color pixel groups into either a progressively increasing or decreasing sequence;
- and
- visually displaying at said selected light color and intensity each of said constant color pixel groups for its said determined exposure time to the photosensitive material either starting with the first of said constant color pixel groups in said ordered sequence and thereafter adding succeeding constant color pixel groups in said ordered sequence to said visual display so as to finally display all of said constant color pixel groups simultaneously in said ordered sequence when said ordered sequence comprises progressively decreasing exposure times or, alternatively, starting by simultaneously displaying all of said constant color pixel groups in said ordered sequence and thereafter eliminating from said visual display succeeding constant color pixel groups in said ordered sequence so as to finally display only the last of said constant color pixel groups in said ordered sequence when said ordered sequence comprises progressively increasing exposure times.
2 more elements
A system for defining and displaying an image for photographic reproduction comprising:
- video display means for visually displaying the image to be photographed;
- and
- computer means responsive to user controlled input signals and a preselected program for defining and storing within a computer memory the image to be photographed as a plurality of constant color pixel groups;
- for thereafter determining the time during which a selected photosensitive material must be exposed to a selected light color and intensity for each of said constant color pixel groups;
- for thereafter ordering said determined exposure times for each of said constant color pixel groups into either a progressively increasing or decreasing sequence;
- and for finally providing a video image signal to said video display means in order to display at said selected light color and intensity each of said constant color pixel groups for its said determined exposure time to the photosensitive material, said computer means starting said video image signal either with the first of said constant color pixel groups in said ordered sequence and thereafter adding succeeding constant color pixel groups in said ordered sequence to said video image signal so as to finally simultaneously include in said video image signal all of said constant color pixel groups in said ordered sequence when said ordered sequence comprises progressively decreasing exposure times or, alternatively, with all of said constant color pixel groups in said ordered sequence and thereafter eliminating from said video image signal succeeding constant color pixel groups in said ordered sequence so as to finally include in said video image signal only the last of said constant color pixel groups in said ordered sequence when said ordered sequence comprises progressively increasing exposure times.
3 more elements
Auxiliary apparatus for use with a computer, said apparatus comprising:
- means for presenting light emitting displays for photographic recording on a selected photosensitive material in operative relation with respect to said display means;
- and
- means responsive to user controlled input signals for cooperating with the computer to define and store within the memory of the computer information, indicative of the final complete image to be recorded on selected photosensitive material, as a plurality of constant color pixel groups;
- to determine the time during which the selected photosensitive material must be exposed to light emitting from said display means to record image information thereon corresponding to each of said constant color pixel groups;
- to thereafter order said determined exposure times for each of said constant color pixel groups into either a progressively increasing or decreasing time sequence;
- and to finally sequentially provide a plurality of signals to said display means required to display each of said constant color pixel groups for its said determined exposure time to the selected photosensitive material, said plurality of signals being presented to said display means during at least a portion of the photosensitive material exposure operation to either sequentially add succeeding constant color pixel groups in said ordered sequence when said ordered sequence comprises progressively decreasing exposure times or, alternatively, to sequentially subtract succeeding constant color pixel groups in said ordered sequence when said ordered sequence comprises progressively increasing exposure times.
3 more elements
Dependencies are inferred from the claim text.