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Grayscale Test Card TE223
Brand: ESSER Aisha/Sine Image Model: TE223 Size: 280 x 157.5mm Scale: 16:9 Type: Reflective/transmissive optional
Product details
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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