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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:
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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 %).
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