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Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
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Fig. 5. Schematic diagram — optical multiplexer.
scale and grain. A great deal of the difference may well lie in the more careful control of exposure, step-printing and processing of 35mm film. It may be economically unsound to expend the same effort on production of 16mm film subjects. While there seems to be practically no likelihood of using 35mm film, except for network originations where the demands for high quality are extremely exacting, it is important to stress the fact that any technical improvements in 16mm film quality will be directly reflected in improved television picture quality.
A question often asked by broadcasters who have witnessed film reproduction with the vidicon camera is: "What are the results using the vidicon with poor-quality film?" The answer, unfortunately, is: "Poor." No television system, including the vidicon camera, can do very much to make film of poor technical quality look better on television than it looks on direct critical viewing. Perhaps a conservative way of expressing the same idea is to say
that the system should introduce a minimum amount of deterioration in the translation of the optical information into a television picture signal.
Conclusions
Our study of the possibilities inherent in the use of the vidicon camera for high-quality reproduction of motionpicture film has been going on for about two years. During the last six months, the results have been observed by a wide range of critical television broadcasting observers, both in the laboratory and at the NARTB Convention at Los Angeles. The comments on reproduction fidelity, gray-scale reproduction, signal-to-noise ratio and operational stability have been extremely gratifying. We believe that the vidicon approach to motion-picture reproduction represents the most promising method of high-quality reproduction now available, and hope that its use in commercial broadcasting will continue to justify the enthusiasm which has been aroused during its development.
Kozanowski: Vidicon Cameras
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