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- Place the gray card on the tray make sure that it is level and perpendicular to the camera’s axis. The card should be positioned at the height of the core surface. This is an important step. If the card is placed closer to the camera your calibration will be off.
- Turn on the lights, with the same method used to turn off the lights, and move the camera over the gray card.
- Unfocus the lens on the camera (Figure 25). Look at the Profile graph and rotate the lens’ focus until the RGB lines are smooth , then rotate the lens’ focus until the RGB lines are noisy showing the maximum difference between the low and high values. The camera is now focus.
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