Back to Setting Up the Digital Extension
Introduction
This document discusses how to use Vignette Correction.
IMPORTANT: Since the vignetting of a camera lens can interfere with the LUT Measure, Vignette Correction must be made before the LUT Measure.
NOTE: You can choose not to use Vignette Correction for the Digital Extension. This, however, will negatively impact the LUT Measure process and therefore the color accuracy of the Digital Extension.
Vignette Correction
Camera lenses always come with some vignetting in the corners and around the edges of the image. It is recommended to compensate for this effect before creating a LUT.
Go to the INPUTS control board. Select VIGNETTE X:
Vignette Correction of Zoom Lenses
You can make vignette corrections at multiple zoom values/points for a zoom lens. In this case, Aximmetry will automatically calculate the vignette correction values between the corrected zoom values/points.
NOTE: It is recommended that the number of zoom values/points for which you perform the vignette correction be evenly distributed across the zoom range.
Starting the Vignette Correction Process
To start the process of Vignette Correction, first, click on the power button present on the VIGNETTE X control panel:
NOTE: If you already have a Vignette Correction, then you can turn its application on or off with this button.
Then, on the Pin Values panel, turn the Capture pin ON:
A series of on-screen instructions will appear on the preview video output.
Follow the instructions to complete the process.
Once the process is completed, Aximmetry will automatically save and set the new vignette correction file.
Aruco Marker
At the beginning of the Vignette Correction process, the use of a specific Aruco marker is required.
IMPORTANT: The specific ArUco marker is (standard 6x6, ID70) in a specific size (180x180mm).
IMPORTANT: The Aruco marker has to be printed on a 3 mm-thick material.
NOTE: You can download the marker from here: Aximmetry Eye ArUco marker
NOTE: Or you can generate the same exact marker here: https://chev.me/arucogen/. (Required settings: Dictionary: standard 6x6; Marker ID: 70; Marker size, mm: 180)
