图5，对 CIE 1931标准色度观察者X刺激值平滑计算的过程中，一级

5, the process of CIE 1931 standard colorimetric observer tristimulus values ​​X smoothing calculation, a step difference change map; wherein X is a stimulus value FIG FIG; B, FIG yellow line c is two a stimulus value X FIG stepped level, the red stimulus value X is a smooth stepped FIG; C red line is calculated, small stimulus values ​​X a smoothed FIG step difference; D FIG stimulus value X is superimposed FIG its smoothed value, red line FIG smoothed value X stimulus value, the following yellow line stimulus value X in FIG.

Figure 5, in the process of smoothcalculation of the X-rated value of CIE 1931 standard chroma observer, the change of the first order difference is the figure of the X stimulus value, the yellow line of b and c two graphs is the first order of x stimulus value, the red line is the first order difference graph of the smooth X stimulus value, the c-red line is the first order difference chart for calculating the large and small smooth X-stimulus value. ;d graph is the X stimulus value overlaps with its smoothing value, the red line is the X stimulus value smoothing value graph, the yellow line below is the X stimulus value graph.

Figure 5, for CIE In 1931, in the process of smooth calculation of x-stimulus value, the first-order difference graph of the standard colorimetric observer, in which a graph is the x-stimulus value graph; the yellow line of B and C graphs is the first-order difference graph of x-stimulus value, and the red line is the first-order difference graph of smooth x-stimulus value; the red line of C graph is the first-order difference graph of large and small smooth x-stimulus value; the D graph is the overlap graph of x-stimulus value and its smooth value, and the red line is the smooth value of x-stimulus value Figure, the yellow line below is the figure of X stimulus value.