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You Are Here : Home >> Products >> Image test chart >> Grey Scale Card >> COLOR CAMERA GRAY SCALE TEST CHART

COLOR CAMERA GRAY SCALE TEST CHART

Two 9-graduated counter current gray scales are arranged on a gray background (D ≈ 0.75), the gray scales being graduated logarithmically (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 50:1.
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Date:2017-06-13  Browse:
  • Introduction
  • Product Software

                     COLOR CAMERA GRAY SCALE TEST CHART

                                                       REFLECTANCE

 

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

logarithmically(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 50:1.

 

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

Step

Density

Remission in %

Output voltage in %

1

0.22

60

100

2

0.32

48

88.75

3

0.44

36

77.5

4

0.57

26

66.25

5

0.73

19

55

6

0.91

12

43.75

7

1.13

07

32.5

8

1.43

04

21.25

9

1.85

01.4

10

 

The density values are based on a density of BaO4S= 0.

 

The test chart incorporates a super black cavity for the accurate adjustment of camera flare corrections and setting of black level.

On both sides of the super black hole 4.5 and 5.5MHz bars with a contrast ratio of 7:1 are located. Above and below the gray

scales there are additional markings for the 16:9 format.