ESSER/Sine Image DNP 11 Steps Grayscale Camera Test Chart
DNP 11 Steps Grayscale Camera Test Chart
Model Number：TE83
Size：280 x 210mm
Ratio：4:3
Model：Reflective / Transmission
DNP 11 steps grayscale test chart are used for test grayscale of camera.It is normally used with desktop color assessment cabinet or hanging on the wall.Those grey modules are displayed in a reverse chronological order based on a grey backgroup （D≈0.62）,those gray scale are marked by log level （gamma=0.45).Contrast range for this chart is 40:1.
Technical Parameters:
| Grayscale | Density | Reflective% |
| 1 | 0.05 | 89 |
| 2 | 0.13 | 74 |
| 3 | 0.22 | 60 |
| 4 | 0.32 | 48 |
| 5 | 0.43 | 37 |
| 6 | 0.55 | 28 |
| 7 | 0.69 | 20 |
| 8 | 0.86 | 14 |
| 9 | 1.06 | 9 |
| 10 | 1.31 | 5 |
| 11 | 1.65 | 2 |
There are two models about 11 steps grayscale test chart，(γ=1.0) or (γ=0.45)
Following are the reflectivity and grayscale density value about the grayscale (γ=1.0) :
| Grayscale |
1 (white) |
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Background |
| Reflectivity(%) | 83.0 | 74.9 | 66.8 | 58.7 | 50.6 | 42.5 | 34.4 | 26.3 | 18.2 | 10.1 | 2.0 | 18.0 |
| Density Value | 0.08 | 0.13 | 0.18 | 0.23 | 0.30 | 0.37 | 0.46 | 0.58 | 0.74 | 1.00 | 1.70 | 0.74 |
Following are the reflectivity and grayscale density value about the grayscale (γ=0.45) :
| Grayscale |
1 (white) |
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Background |
| Reflectivity(%) | 83.0 | 71.0 | 57.0 | 46.0 | 37.0 | 27.4 | 19.5 | 13.4 | 8.3 | 4.75 | 2.0 | 18.0 |
| Density Value | 0.08 | 0.15 | 0.24 | 0.34 | 0.43 | 0.56 | 0.71 | 0.87 | 1.08 | 1.32 | 1.70 | 0.74 |
How to use it?
Adjust the camera aperture to the brightness point when the waveform monitor’s video signal reached 100%. Then use a calibrated camera with IT U BT.709 standard and the darkness modules will be reached 10% signal level.