You Are Here : Home >> Products >> SimageTest Charts >> Sineimage YE0108 Logarithmic Gray Scale Test Chart

Sineimage YE0108 Logarithmic Gray Scale Test Chart

SineimageYE0108 Logarithmic Gray Scale Test ChartModelYE0108TypeReflectance/TransparentFormat280*210mm(A280 D240)Ratio4:3MaterialFilm or HD photographic paperTwo 9-graduated counter current gray scales are arranged on a gray background (D = 0.75), t
More Photos:
Date:2019-08-14  Browse:
  • Introduction
  • Product Software

Sineimage YE0108 Logarithmic Gray Scale Test Chart


 

Model

YE0108

Type

Reflectance/Transparent

Format

280*210mm(A280 & D240)

Ratio

4:3

Material Film or HD photographic paper 



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 signal of an optimal gamma-corrected camera yields two 11-graduates counter current linear step signals. The contrast range of the gray scales is 50 : 1.


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

Step

Density

Reflectance in %

  Output voltage in %

1

0.15

71

100

2

0.26

55

88.75

3

0.37

42

77.5

4

0.51

31

66.25

5

0.67

22

55

6

0.85

14

43.75

7

1.09

8

32.5

8

1.40

4

21.25

9

1.85

1

10

  

The density value are based on a density of BaSO 4 = 0. Two fields of black velvet and white 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 0.09 (reflectance = 79%).


When the second brightest gray step (D=0.26) is adjusted to a 100% signal level, the gray scale has the High Dynamic Range of 1:40 which is recommended for TV productions. The brightest step then shows the effect of the knee function. In order to see a finer graduation of the knee function and to observe its effects in the 3 channels we recommend an overexposure of 2 steps. The white area in the center can also be used for adjusting the white level limiter. No generally valid statements can, however, be made on the height of the level limit (e.g. 105%), since this varies according to the respective use (Betacam e.g. 101%).


4/F, Building 8, Nangang Second Industry Zone, Xili, Nanshan District,
Copyright © 2011-2018 Shenzhen 3nh Technology Co., Ltd.. All Rights Reserved.