If you haven’t captured the relevant calibration photography, please refer to this guide.
Exposure Presets must be created in the settings menu, which can be opened by going to:
File -> Settings
Click the Exposure Parameters button to launch the Exposure Parameters Presets window.
In the Exposure Parameters Presets Window you can select from the presets you have made before, remove, or make a new one.
To make a new one click New:
The New Exposure Param Preset window will be launched. Enter the required information to set up a new exposure preset.
Name: Enter a descriptive name for the preset in order to remember it in future.
Raw file: Provide the path of the raw calibration image, obtained from capturing the calibration scene. Full guidance on how to correctly set up the scene to obtain the best possible calibration reference image using a grey colour chart can be found here.
Distance: The measured distance between the centre of the light and the grey card used in the calibration scene.
Grey Value: The percentage value in HSV of grey tile in the section of the colour chart that will be selected from the raw image for exposure calibration - do not write the '%' symbol.
Please refer to the catalogue of colour cards and known % values that we have consolidated.
This is not the Grey %. We are referring to white having 100% value and black having 0% value
Once all of the above fields are completed, clicking the Create button will launch the exposure calibration tool
There may be some delay before the calibration tool is launched). Then follow the onscreen instructions.
Selecting a region
When the dialogue launches, you will see your calibration image with a prompt to select a region of your grey card. Draw a selection box over the area of interest. The larger the box is the better the exposure solve will be about to account for noise & subtle changes in illumination. Press Enter to confirm the selection.
Once you have created a selection, another window will launch prompting you to draw another box, this time to calibrate the white balance.
W/S - Key to make the preview image brighter or darker.
R - To reset the brightness
Enter - Confirm Selection
C - Clear Selection
Loading a Preset Exposure Calibration
Once the new exposure preset is created, it will be stored and available to pick from the list in the presets dialog. The desired exposure preset can be loaded by selecting the corresponding row in the list and clicking the Save button.
The loaded preset will be reflected in the settings window, and used for any processing jobs created while it is selected.