TE165 A 11-STEP GRAY SCALE TEST CHART 16:9 / BT.709 Reflectance

TE165 A 11-STEP GRAY SCALE TEST CHART 16:9 / BT.709 Reflectance is designed for evaluation of the halftone reproduction of electronic cameras.

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Date:2018-02-03 Browse:

TE165 A 11-STEP GRAY SCALE TEST CHART 16:9 / BT.709 Reflectance

TE165 A 11-STEP GRAY SCALE TEST CHART 16:9 / BT.709 Reflectance is designed for evaluation of the halftone reproduction of electronic cameras.

Two 11-graduated counter current gray scales are arranged on a gray background (D ≈ 0.56), the gray scale corresponds to the ITU recommendation BT.709.

The output signal of an optimally gamma-corrected camera according to BT.709 generates two counter current, linear step signals.

The contrast range of the gray scale is 40 : 1.

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

Step 灰阶等级	Density	Remission in %	Video signal for BT.709 in %	Video signal for gamma 0.45 in %
1	0.05	89	100	100
2	0.13	74	91	92
3	0.22	60	82	84
4	0.32	48	73	75
5	0.43	37	64	67
6	0.56	28	55	59
7	0.70	20	46	51
8	0.88	13	37	43
9	1.08	8	28	35
10	1.34	5	19	26
11	1.64*	2	11	19

*The production process for reflective charts allow a maximum printed density of 1.64. The target value for the darkest step is 1.70. Therefore the distance of the last step differ slightly.

Two black fields and a white field are located between the gray scales. The density of the black fields in the middle is D > 3 (remission < 0.1 %), the white field between has a density of 0.05 (remission 89.9%).