Bezryadin. Digital Still Camera Detector System Quality Criterion. Accuracy of current FCS conception.

4. Accuracy of current FCS conception.

FCS, defined with 10° CIE (1964) standard, is differ from FCS, defined with 2° CIE standard. The angle deviation between 2° CIE standard and 10° CIE (1964) standard for XYZ base vectors is displayed in the table below.

	x(λ)	y(λ)	z(λ)
2° CIE (1931) standard	2.98°	4.19°	5.09°
2° CIE (1978) modified standard	2.86°	4.35°	7.63°

Therefore, taking into account the accuracy of XYZ determination, an angle difference less then 5° might be considered as an appropriate according to the accuracy of current conception of human vision.

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