Camera Matching and Illumination Control for Color TV

In the development of color camera matching techniques it was found inadvisable to use colored paper or other opaque material illuminated by direct front projection. The reasons are: (1) illumination of the test chart is extremely critical in obtaining the exact values of each color chip on a day-to-day basis; and (2) generally, stable color papers do not have the degree of reproducibility in manufacture and the degree of saturation required for precise measurement purposes. A color camera alignment and matching technique has been developed using 8 × 10 transparent slides of both black-and-white and color. This technique required that the source of illumination for the slides be of the proper brightness and spectral response normally encountered on a live set.

Print ISSN

0361-4573

Published

1956-09

Content type

Original Research

DOI

10.5594/J11294