We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
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.
1950 EFFECTS OF COLOR TEMPERATURE 87
advise the cameraman as to the best illuminant for a particular emulsion, and if the cameraman, under the pressure of production were obliged to shoot scenes with an incorrect illuminant, a single dot on a graph would tell the laboratory the nature and amount of the deviation to be expected.
An instrument incorporating the logarithmic scales described here for the blue-red and green-red values is shown in Fig. 11.
Much work remains to be and will be done on the system herein described. In the meantime, it has seemed to us that the results are sufficiently promising and interesting to warrant publication and availability for discussion at this time.
REFERENCES
1. ASA Z38.21 ( 1947), "American standard method for determining photographic speed and exposure index," American Standards Association, 70 E. 45 St., New York.
2. E. J. Wall, Practical Color Photography, Amer. Phot. Publishing Co., p. 59, Boston, 1928.
3. "A Maxwell Triangle Yielding Uniform Chromaticity Scales," Research Paper RP756, Bureau of Standards, p. 52.
4. Norman Macbeth and Dorothy Nickerson, "Spectral characteristics of light sources," Jour. SMPE, vol. 52, pp. 157-183, Feb. 1949.
5. R. M. Evans, An Introduction to Color, pp. 213-14, John Wiley, New York,
1948.
6. Committee on Colorimetry, "Physical Concepts; radiant energy and its measurement," /. Opt. Soc. Amer., vol. 34, pp. 183-218, Apr. 1944.
7. L. A. Jones and H. R. Condit, "Sunlight and skylight as determinants of photographic exposure, Part II, Scene structure, directional index, photographic efficiency of daylight, safety factors and evaluation of camera exposure," /. Opt. Soc. Amer., vol. 39, pp. 94-135 (p. 123), Feb. 1949.
8. "A Spectral Sensitivity Index for photographic emulsions and calculations based thereon," Jour. PSA, vol. 9, No. 8, p. 386, October, 1943; and No. 9, p. 585, December, 1943.