Journal of the Society of Motion Picture and Television Engineers (1950-1954)

Record Details:

Title:
Journal of the Society of Motion Picture and Television Engineers
Date:
1950-1954
Publisher:
Easton, Pa. : The Society
Volume:
Journal of the Society of Motion Picture and Television Engineers
Leaf #:
000727
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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722 COLOR SENSITOMETRY June peaked distributions which are symmetrical. A narrow tall distribution indicates a more uniform product than a wide shallow distribution. Control Charts The order or time sequence in which a set of experimental results was obtained can be shown by presenting data in the form of a con 2.60 2.40 r > L y V j f / \ / \ **^ \ } \ / ooo « 1 n : s ] / M 1 ^-< f [ 10 15 20 25 30 35 40 45 50 55 MINUTES AFTER START OF PROCESSING Fig. 14. Statistical control chart for a one-hour run of an experimental process. Duplicate strips were run at 2^2-min intervals, and the blue densities were read for one image on each strip. The lower chart shows the density differences between duplicate strips. The upper chart shows the average density of duplicate strips. The downward trend shown on the upper graph exceeds the control limits calculated from the results shown in the lower graph. trol chart.30 The experimental work should be designed so 'that the results can be arranged logically into rational subgroups. These rational subgroups can be chosen within test machines, within test operators, within arbitrary units of material, within stated periods of time, and in many other logical ways. The control chart compares the variability of the entire set of results with the variability within these rational subgroups. Figure 14 shows a control chart for the results of processing dup