Three color image

ADDITIVE COLOR PROCESS. An early system of color imagery in which the color synthesis is obtained by the addition of colors one to another in the form of light rather than as colorants. This color addition may take place (1) by the simultaneous projection of two or more (usually three) color images onto a screen, (2) by the projection of the color images in rapid succession onto a screen or (3) by viewing minutely divided juxtaposed coloi images. 

When the additive synthesis is made by successive viewing, the same three-color images must be flashed onto the screen in such rapid succession that the individual red, green, and blue images are not apparent. Simple... 

The perceived color stabiUty of a photographic system is usually limited by the fa ding of its least stable dye, which can produce an undesirable shift in color balance. Whereas recovery of such faded images is often possible, a so-called neutral fade, in which all three color records lose density at approximately the same rate, is usually preferred. 

To obtain color images with a HCCD camera, filter wheels will be used, in which each filter will be chosen specifically for one fluorescent label, in emission and in excitation. For CL or BL work, one filter wheel is sufficient. For fluorescence, two are necessary (see, for instance, in Fig. 3 the positioning of the filter wheels in the optical path). If, for instance, a three-color experiment is performed, an image will be acquired for each label with the adapted filter(s). The three gray-level images are sequentially acquired. They will then be colored ... 

N1)-Fused heterocycles have been found of major application as photographic materials. Azomethine dyes are used in conventional three-color (yellow, magenta, and cyan) photographic imaging <1998JAP10264541,... 

Electron microprobes can be used in spot mode to measure the chemical compositions of individual minerals. Mineral grains with diameters down to a few microns are routinely measured. The chemical composition of the sample is determined by comparing the measured X-ray intensities with those from standards of known composition. Sample counts must be corrected for matrix effects (absorption and fluorescence). The spatial resolution of the electron microprobe is governed by the interaction volume between the electron beam and the sample (Fig. A.l). An electron probe can also be operated in scanning mode to make X-ray maps of a sample. You will often see false-color images of a sample where three elements are plotted in different colors. Such maps allow rapid identification of specific minerals. EMP analysis has become the standard tool for characterizing the minerals in meteorites and lunar samples. 

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