HDR-VDP-2: Calibration parameters
This is a complete list of HDR-VDP-2 parameters that were found by fitting the visual model
to several contrast detection test sets.
Refer to the paper for a detailed explanation.
The suggested model parameters may be periodically updated.
For the latest set of parameter values, refer to the
HDR-VDP-2 web-site.
This is the result of calibration made on 18 Jan 2011
MTF - modullation transfer function of the eye
| k | ak | bk |
|---|
| 1 | 0.424839 | 0.028 |
| 2 | 0.572435 | 0.37 |
| 3 | 0.000167576 | 37 |
| 4 | 0.00255872 | 360 |
CSF - (neural) contrast sensivitity function
| Adapting luminance La [cd/m2] | p1 | p2 | p3 | p4 |
|---|
| 0.002 | 1.00195 | 3.54717 | 1.08514 | 3.535 |
| 0.02 | 0.795286 | 3.24414 | 1.45004 | 3.60714 |
| 0.2 | 0.423683 | 4.22778 | 1.56528 | 3.62531 |
| 2 | 0.348077 | 4.24637 | 1.96683 | 3.62059 |
| 20 | 0.246298 | 3.85941 | 2.24956 | 3.7662 |
| 150 | 0.209051 | 3.06441 | 2.34258 | 3.58503 |
sA - joint luminance sensitivity
| p5 | p6 | p7 | p8 |
|---|
| 30.182 | 4.3806 | 1.5154 | 0.29412 |
Neural noise - contrast masking - psychometric function
| p | q | kself | kxo | kxn | β |
|---|
| 3.5 | 3.13155 | 1.54549 | 2.81319 | 33.5058 | 1 |
Image quality - spatial frequency band weighting
| Spatial frequency [cpd] | Weight wf |
|---|
| 15 | 0.2963 |
| 7.5 | 0.2111 |
| 3.75 | 0.1737 |
| 1.875 | 0.0581 |
| 0.9375 | -0.028 |
| 0.4688 | 0.0586 |
| 0.2344 | 0.2302 |
Image quality - logistic function