Method and apparatus for correlating video and film images produced from electronic data
AssigneeGeneral Electric Company
InventorsThomas W. Lambert, Walter L. Robb, Barry F. Belanger
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Abstract
A system for transferring electronic image data to film which provides correlation or matching between an image as viewed on a video monitor and an image viewed on film. Apparatus is disclosed for measuring image intensity on a video monitor and converting the measured intensity to electronic signals. The image intensity on film under controlled lighting is measured and signals representative of film density provided. The signals obtained by the two measurements are compared and any difference is used to vary a film writing system in a manner to minimize the difference.
Claims10
In an imaging system for transferring electronic image data to video and film images including an electronic monitor for providing a video image and a film writing system for transferring the electronic image data to film, a method for providing uniformity between the video image and the displayed film image comprising the steps of:
- providing a set of intensity values on the monitor;
- measuring the intensity of the values on the monitor;
- converting the measured intensity values to electronic signals;
- storing the electronic signals;
- writing the intensity values on film;
- summing the intensity values written on the film with the stored measured intensity values represented by the electronic signals;
- and
- adjusting the writing intensity such that the film image intensity values correspond to the measured monitor intensity values.
An electronic data conversion system for transferring data to film images having comparable intensity to a video image of the data comprising:
- means for providing a set of electronic image data representative of an image to be displayed;
- a video monitor coupled to receive and display the image represented by the data;
- a film writing system;
- means coupling said image data to said film writing system for writing the image represented by the data or film;
- means for comparing the intensity of the film image displayed against a predetermined light intensity to the image intensity on the monitor;
- and
- means for adjusting the film writing system to minimize any differences between the film image intensity and the monitor image intensity.
Dependencies are inferred from the claim text.