Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
00012
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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1949 COLOR PROCESSING CONTROL 9 optimum operating capability of his apparatus and a deviation that represents improper control. For this reason, graphical methods are employed. By following such a graph, it is possible to control the machine output within narrow limits. Fig. 5 illustrates another series of developments; it can be seen that for developments A through B fluctuations ranged upward and downward in a fairly regular pattern. This was normal machine operation. Beginning with B, although the fluctuations were still up and down, the majority was running higher GRAPHICAL RECORD OF MACHINE OPERATION MAGENTA I CYAN 0 YELLOW 3 30 AM 6AM 12PM 4PM 8P> CONSECUTIVE CONTROL STRIPS APPROX 1/2 HR. INTERVALS Fig. 5 than normal in density. This to the controlman indicated a definite trend toward lower speed that would require corrective measures. Since this rise was accompanied by a slight gain in the magenta and yellow density over the cyan layer in the middletone region (density 1.2) and also in the shoulder densities, he increased the replenishment rate of the first developer by 10 per cent. As can be seen by C" to D (film C to C' had passed through the first developer before the correction could be applied), this change of replenishment rate achieved the desired result as the speed increased and the color balance became more neutral.