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LOGARITHMIC GRAY SCALE TEST CHART 16:9

LOGARITHMIC GRAY SCALE TEST CHART 16:9

Brand Name : Sine Image/ESSER
Model Number : YE127/TE127
Certification : ISO9001
Place of Origin : China
MOQ : 1 pc
Payment Terms : T/T
Supply Ability : 1000 pcs per month
Delivery Time : 3 work days
Packaging Details : Standard package
Gray scale : 9-graduated counter
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LOGARITHMIC GRAY SCALE TEST CHART 16:9


REFLECTANCE


Two 9-graduated counter current gray scales are arranged on a gray background (D=0.75), the

gray scales being graduated logarithmically.


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


Related to the reflection values (brightness): gamma = 2.2, that being exactly the reciprocal value

of gamma=0.45.


The output of an optimally gamma-corrected camera yields two 9-graduated counter current linear

step signals. The contrast range of the gray scales is 56:1.


The values of the 9-graduated gray scales are as follows:

StepDensityReflectance in %Output signal in %
10.1571100
20.265588.75
30.374277.5
40.513166.25
50.672255
60.851443.75
71.09832.5
81.39421.25
91.851.410

The density values are based on a density of BaSO4 = 0. Two black fields and a white field

are located between the gray scales. The density of the black field is D > 2.4 (reflectance < 0.5 %).

The density of the white field is D = 0.05 (reflectance = 90%)


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LOGARITHMIC GRAY SCALE TEST CHART 16:9 Images

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