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HDTV Grayscale Test Chart Card
Brand: Sine Image Model: YE0223 Size: Customizable Material: High definition photo paper/film Ratio: 16:9 Type: Reflective/transmissive optional
Product details
Introduction to HDTV Grayscale Test Chart Card
The HDTV grayscale test chart is used for evaluating the color tone reproduction of cameras. Two 13 degree grayscale bars are arranged in opposite directions on a gray background (D=0.75), and the grayscale bars are graded logarithmically.
Grayscale density: Gamma=0.45, transmission value (brightness): Gamma=2.2, which is exactly the inverse of Gamma=0.45. The output signal of a camera with optimal gamma correction produces two opposite 13 degree linear step signals.
The contrast range of grayscale is 200:1.
13 degree grayscale test card parameter table
| Step Grayscale level |
Density density |
Reflectancein% reflectivity |
| 1 | 0.05 | 89 |
| 2 | 0.13 | 74 |
| 3 | 0.21 | 62 |
| 4 | 0.30 | 50 |
| 5 | 0.40 | 40 |
| 6 | 0.51 | 31 |
| 7 | 0.63 | 23 |
| 8 | 0.78 | 17 |
| 9 | 0.95 | 11 |
| 10 | 1.15 | 7 |
| 11 | 1.41 | 4 |
| 12 | 1.77 | 2 |
| 13 | 2.35 | 0.5 |
The density of the white area between two grayscale bars is D=0.05 (reflectivity=89%).
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