This setting should be set to reflect the resolution you’re working on, or the resolution you’re exporting for.
For instance, if you are color grading in a UHD or 4K timeline, you must select the UHD / 4K resolution factor before adjusting the texture in Diaphanie.
Then, if you’re delivering the same project in a HD or 2K deliverable, the setting must be changed to HD / 2K before exporting. All the texture effects will be scaled accordingly (e.g. halation blur strength, grain size and so on). This ensures the consistency of the texture transformations across different resolutions.
If you apply a blanking to your image, or if your image does not cover all the timeline window, the texture operators might interact with the black pillar or letter boxes.
To prevent that, you need to check enable region of interest and select the proper output ratio . You can enabled show image borders to finely tune your own custom ratio : the region of interest borders will turn red so that you can be sure of your setup.
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The region of interest is like a blanking in the end: everything out of it will be erased to black. Be sure to place it at the frontier of your timeline blanking.
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The region transform settings allow for more customization of the region of interest. It can be used in specific cases such as when the image is scaled down inside the timeline.
Spatial EqualizerThe Spatial Equalizer module allows you to control the definition of specific areas of the picture, based on the level of detail.
The spatial equalizer controls image contrast by spatial frequency band. It can be used to manage image modeling and sharpness. The high spatial frequencies (bands #1 and #2) are the fine details, the medium frequencies (#3, #4) correspond to modeling, and the low frequencies (#5, #6) correspond to the image's major contrast and light trends.
By modulating these different zones, you can intervene on the system's MFT curve, i.e. the precision or smoothness of the camera/lens pair. This is an absolutely structuring element of the image texture, which is most often left to the camera manufacturer and its demosaicing choices. The spatial equalizer allows you to regain control over this aspect of the image.
| frequency threshold | Global modulation of the frequency bands. Acts as an offset for each of the 6 zones.
A common practice is to use this parameter to set the correct selection for the finest zone: since all zones are correlated, manually setting the finest zone (#1) will make sure you cover the sharpest details of your picture, and coarser details will be covered progressively by zones 2 to 6. |
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| zone gain (frequency band #1 to #6) | Adjusts the presence of each related frequency band.
selection settings | The selection settings allow for higher customization of the zones and the frequencies they cover. Default values should cover most use cases. |
| frequency | |
| show frequency areashow frequency # | When show frequency area is selected, the viewer highlights the parts of the image that are covered by the zone selected with show frequency #.
It may help when you are adjusting the frequency threshold or the various blur strengths. |
| blur strength (frequency band #1 to #6) | Will adjust the blur strength of each of the algorithm passes. They may be tricky to balance as they will impact every band which interact with one another.
👉 If needed, you should start from the coarser band, showing the last area (show frequency #6) and go back step by step to the finer zone (shhow frequency #1). |
| tone | The tone selection helps reduce the impact of the spatial equalizer operations on the extreme luminance values of the picture (the brightest and darkest areas of the picture). This helps reducing aberrations and unpleasant results. It is enabled by default, and its behavior can be customized or disabled with this group of settings. |
| apply sweeteners | Will apply the spatial equalizer sweeteners that will help achieve a satisfying image rendering. |
| bell curve narrowness | Restricts the effect toward midtone values only:
0.0 = the Spatial Equalizer is not restricted and will apply to all values
200.0 = the Spatial Equalizer effects are restricted to the values closest to the mid-grey point |
| luma blend | Will apply the frequency gains on a blend between the RGB channels and the luma, according to its value:
0 = the effect is applied on the RGB channels. It might increase the chroma of the intrinsic image noise
1 = the effect is only applied to the luma |
Halation