摘要
本文提出物体色三刺激值的一种修正计算方法,它采用测量出的反射率值与由三次样条插值法求出的反射率预期值的求和来近似表示三刺激值积分,可使三刺激值的精确度得到改善。文中对不同的测量及求和间隔对三刺激值的影响进行了讨论,并得出如下结论:对于大多数实际应用场合,波长范围应取380～780nm,波长测量间隔应取10nm;如果采用插值和外推,则波长范围可缩小到400～700nm,而波长测量间隔可增大到20nm。
This paper introduces an improved method for tristimulus calculation of object colour, at which the tristimulus integration is approximated by summation with all measured reflectances and predicted ones obtaining from the cubic splines interpolation. The accuracy of tristimulus values can be improved by using this method. The influence of different intervals of measurement and summation on tristimulus is discussed. The following conclusions are drawn, the use of 10nm reflectance measurement interval over the range of 380-780nm is reasonable for most practical purposes; when the interpolation and extrapolation are used, the wavelength range can be narrowed down to 400-700nm, and the measurement interval can be increased to 20nm.
出处
《计量学报》
CSCD
1989年第2期157-159,共3页
Acta Metrologica Sinica
