Autographic theme extraction
January 1, 1973
Remote-sensor images, including aerial and space photographs, are generally recorded on film, where the differences in density create the image of the scene. With panchromatic and multiband systems the density differences are recorded in shades of gray. On color or color infrared film, with the emulsion containing dyes sensitive to different wavelengths, a color image is created by a combination of color densities. The colors, however, can be separated by filtering or other techniques, and the color image reduced to monochromatic images in which each of the separated bands is recorded as a function of the gray scale.
Citation Information
Publication Year | 1973 |
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Title | Autographic theme extraction |
DOI | 10.3133/7000079 |
Authors | D. Edson, Alden P. Colvocoresses |
Publication Type | Report |
Publication Subtype | USGS Unnumbered Series |
Series Title | General Interest Publication |
Index ID | 7000079 |
Record Source | USGS Publications Warehouse |