In March, Facebook said it would begin banning posts, photos and other content that reference white
nationalism and white separatism, The Washington Post reported.
The luminance (Y), relative luminance (Y/[Y.sub.n]) chromatic coordinates (u' and v') and hue angle ([h.sub.uv]) for the reference white (R = G = B = 255) and the 3 primaries were: Red (Y = 14.6 cd/[m.sup.2], Y/[Y.sub.n] = 0.296, u' = 0.404, v' = 0.530, [h.sub.uv] = 1748[degrees]); green (Y = 31.2 cd/[m.sup.2], Y/[Y.sub.n] = 0.633, u' = 0.119, v' = 0.561, [h.sub.uv] = 132.12[degrees]); blue (Y = 3.5 cd/[m.sup.2], Y/[Y.sub.n] = 0.071, u' = 0.170, v' = 0.155, [h.sub.uv] = 263.78[degrees]); white (Y = 49.3 cd/[m.sup.2], Y/[Y.sub.n] = 1, u' = 0.204, v' = 0.467).
The coordinates for the screen primaries (black line triangle's vertices in Figure 4) and its reference white (black dot in Figure 4) were measured with a luxo-colorimeter (see Method).
The conversion from reference white RGB color space to average daylight (D65), CIE [XYZ.sub.D65] color space is given below ;
By using von Kries transforms, [XYZ.sub.D65] color space acquired according to D65 reference white is converted to CIE XYZD55 color space according to the D55 reference white used in our lighting system.
Where L*, a* and b* represent, lightness, red-green, and yellow-blue coordinate respectively; X, Y, Z are the CIE XYZ tristimulus values of the sample; [X.sub.n], [Y.sub.n], [Z.sub.n] are the CIE XYZ tristimulus values of the reference white
X, Y and Z are the tristimulus values of the stimulus and [X.sub.n], [Y.sub.n], [Z.sub.n] are the tristimulus values of the reference white
. L * represents lightness, a * approximates redness-greenness, b * approximate yellowness-blueness, [C*.sub.ab] chroma and [h.sub.ab] hue.
where [X.sub.0], [Y.sub.0], [Z.sub.0] are the CIE XYZ tristimulus values of the reference white
. More detailed information on color space can be found in some books about DIP, such as the Ref.
According to Equation 1, lightness ([L.sup.*]) only depends on comparing (l/[l.sub.n]), the luminance (l) of a surface with the luminance corresponding to the reference white
We observed no gonadal intersex in reference white
perch from the PAFL hatchery or Deal Lake.
Thus, Canadian Inuit have significantly different frequencies of MBL alleles compared with both regional reference whites
and published European controls (5).