The requirement that the equal energy point be defined by x = y = 1/3 puts a restriction on the line joining Cb and Cg, and finally, the requirement that the gamut fill the space puts a second restriction on this line to be very close to the gamut in the green region, which specifies the location of Cg and Cb.
均等能量点定义自x = y = 1/3的要求对连接Cb和Cg的直线做了限制，最后，色域充入空间的要求对此线作了第二个限制，它要非常靠近在绿色区域的色域，这规定了Cg和Cb的位置。