. Biophysical science. Biophysics. 7:1/ Neural Aspects of Vision 121 so that by choosing the proper amounts of these, one could match the chromaticity of a given light in terms of the sensation it evoked in the average observer. If the amounts of each of the three standards are indicated by x, y, and z respectively, then one may represent symboli- cally a light A, by A = xA + yA + zA and a light B, by B = xB + yB + zB If one now adds equal amounts of A and B to form a new light C, which may be represented as C = xc + yc + zc then it is found that xA + xB = xc yA + yB = yc and zA + zB = zc In g
. Biophysical science. Biophysics. 7:1/ Neural Aspects of Vision 121 so that by choosing the proper amounts of these, one could match the chromaticity of a given light in terms of the sensation it evoked in the average observer. If the amounts of each of the three standards are indicated by x, y, and z respectively, then one may represent symboli- cally a light A, by A = xA + yA + zA and a light B, by B = xB + yB + zB If one now adds equal amounts of A and B to form a new light C, which may be represented as C = xc + yc + zc then it is found that xA + xB = xc yA + yB = yc and zA + zB = zc In general, any algebraic combination pf colored lights is matched by the corresponding algebraic combination of the amounts of the standards matching these lights. 4>. 400 500 600 700 Wavelength (m|x). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ackerman, Eugene, 1920-. Englewood Cliffs, N. J. , Prentice-Hall
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