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Home > Products > Image test chart > LOGARITHMIC GRAY SCALE TEST CHART YE153/TE153

LOGARITHMIC GRAY SCALE TEST CHART YE153/TE153

LOGARITHMIC GRAY SCALE TEST CHART YE153/TE153

Brand:Sineimage/Esser

Model:YE153/TE153

Dimension:Custermerizable

Type:Reflectance/Transmission

Two 11-graduated counter current gray scales are arranged on a gray background (D=0.75), the gray scale being graduated logarithmically.

Related to the densities of the gray scales: gamma = 0.45

Related to the reflectance values (brightness): gamma = 2.2 , that being exactly the reciprocal value of gamma = 0.45.

The output signal of an optimally gamma-corrected camera yield two 11-graduates counter current linear step signals. The contrast range of the gray scales is 40 : 1.

The values of the 11-graduated gray scale are as follows:

Step

Density

Reflectance in %

1

0.05

89

2

0.13

74

3

0.22

60

4

0.32

48

5

0.43

37

6

0.55

28

7

0.69

20

8

0.88

13

9

1.06

8

10

1.31

5

11

1.65

2








The density values are based on BaSo4 = 0. Two black fields and a white field are located between the gray scales, the density of the black filed is D > 2.4 (reflectance < 0.5 %). The density of the white filed is D = 0.05 (reflectance = 89.9 %).



Attention before using T90-7 camera check cabinet