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 |
|---|
| 0.02 | 0.832 | 2.8475 | 1.4717 | 4.322 |
| 0.2 | 0.4498 | 4.0907 | 1.7038 | 3.7166 |
| 2 | 0.4976 | 3.9007 | 2.1549 | 4.5737 |
| 20 | 0.374 | 3.2786 | 2.4925 | 5.4779 |
| 150 | 0.2978 | 2.9607 | 2.344 | 3.929 |
sA - joint luminance sensitivity
| p5 | p6 | p7 | p8 |
|---|
| 29.4495 | 0.188 | 0.5961 | 1.6212 |
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 | 0.8299 |
| 7.5 | 0.1555 |
| 3.75 | 0.0235 |
| 1.875 | 0.0488 |
| 0.9375 | -0.0992 |
| 0.4688 | 0.1508 |
| 0.2344 | -0.1093 |
Image quality - logistic function