Sineimage YE0109 Logarithmic Gray Scale Test Chart

SineimageYE0109 Logarithmic Gray Scale Test ChartModelYE0109TypeReflectance/TransparentFormat280*210mm(A280 D240)Ratio4:3MaterialFilm or HD photographic paperTwo 5-graduated counter current gray scales are arranged on a gray background (D=0.83), the

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Date:2019-08-15 Browse:

Sineimage YE0109 Logarithmic Gray Scale Test Chart

Model	YE0109
Type	Reflectance/Transparent
Format	280*210mm(A280 & D240)
Ratio	4:3
Material	Film or HD photographic paper

Sineimage YE0108 Logarithmic Gray Scale Test Chart

Two 5-graduated counter current gray scales are arranged on a gray background (D=0.83), the gray scales being graduated logarithmically. Related to the densities of the gray scales: gamma= 0.45. Related to the remission values (brightness): gamma = 2.2, that being exactly the reciprocal value of gamma = 0.45.

The signal of the background is in the middle of the 3 rd and the 4 th step. The output of an optimally gamma-corrected camera yields two 5-graduated counter current linear step signals. The contrast range of the gray scales is 40: 1.

The values of the 5-graduated gray scale are as follows:

Step	Density	Reflectance in %	Output voltage in %
1	0.15	71	100
2	0.37	43	77.5
3	0.65	22	55
4	1.05	9	32.5
5	1.75	2	10

The density values are based on a density of BaO 4 S=0. A field of black velvet is located

The density values are based on a density of BaO 4 S=0. A field of black velvet is located between the gray scales. The density of this field is D > 2.4 (reflectance < 0.5 %).