Description of computer methods of creating color separations for pseudocolor transformations, made possible by improvements in microfilm-generating equipment. A halftone process is chosen in which a picture is divided into many small areas and pseudo-random patterns are plotted in each. Twenty-one patterns are designed. The Datagraphix 4060 is programmed to produce 35mm microfilm frames containing plots of the patterns; their densities are established by densitometer reading. The examples described are for creating pseudocolor transformations based on the two-separation process, but the techniques are applicable for processes requiring any number of separations. A FORTRAN program has been written to create a 21-step gray scale, with each step a rectangle constructed from the patterns. Two separations of the gray scale are generated by the 4060, and a color scale is produced using the separations as the red and blue records in the two-separation process. A pseudocolor transformation of an image is created also from digital data. (See also R-596, R-597, RM-5297.)
This report is part of the RAND Corporation Report series. The report was a product of the RAND Corporation from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.
Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.
The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.