Light Adaptation Tool (LAT)
VISU profiles can be adjusted to suit different lighting environments. This function allows for shifts in hue to the grey balance to enable a neutral grey under a specific light.
How to adjust for Light Adaptation
- Open Calibrator and select a pmm Mode.
- Click the Light Adaption Tool
- Select the variant and the Reference profile that will be used as the input profile
- Click Commit
- A PrintFactory Grey Adjustment chart V1 is set as default, however, you can upload your own file.
- Select the printer you want to print on and set the granularity. This is a level of sub division or how small or large the steps in grey balance you wish to achieve. The higher the delta E, the larger the color shift will be.
- Press Print
-> 6 variations of the Grey adjustment chart are created with the selected Delta E affecting: Yellow, Green, Cyan, Blue, Magenta, Red. They are printed around the original for comparison.
- Select the printer you want to print on and set the granularity. This is a level of sub division or how small or large the steps in grey balance you wish to achieve. The higher the delta E, the larger the color shift will be.
- Press Next and select the correction that you preferred
- Click Finish and an extra Profile is created within the variant you changed.
- Additional changes will always be applied to the original DeviceLink profile
Additional tips:
To evaluate small adjustments, it’s
recommended to print 3-4 versions at 0.5, 1, 1.5, and 2 delta E, especially for
fine-tuning grey balance control.
This is typically done alongside Custom K
tuning for Dye Sublimation using the spot tuning tool.
Once printed, these can be visually
assessed under controlled lighting, allowing for the selection of the most
suitable shift from the charts or even between values. Shifts often involve
Cyan, Blue, or Yellow, but outcomes may vary based on lighting conditions and
ink metamerism.
After gaining experience with the tool
and understanding its effects, users will develop an intuitive sense of the
necessary shifts and their magnitude. As a result, they can reduce the number
of steps and may even make adjustments directly without the need to print and
evaluate the LAT output.
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