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Spectral Sensitivity of Tri-Color Photography

Tri-color separation photography is used for dye transfer prints and by the printing industry. A set of sharp cutting filters is used to separate the red, green and blue portions of an image. One of the commonly used sets of filters for doing this consists of the Wratten #25 (red), #58 (green) and #47 (blue) filters. The graph below shows how these tri-color separation filters compare to the spectral selectivity of the eye's color sensors.


Very believable reproductions of original scenes are created with this and similar sets of tri-color filters that are far from the so called perfect additive color system shown below.


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C1997 by Ed Scott - <dotted.dog@worldnet.att.net>
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