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NEC Display Wall Calibrator Guide de l'utilisateur Page 81

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81 | NEC DISPLAY WALL CALIBRATOR - USER’S GUIDE
Chapter
10
Visual Trim function
The Visual Trim function allows minor adjustments to be made the to the results of the calibration process in order to
improve the visual matching of the displays in the video wall if necessary. This feature can be used in cases where the
automatic calibration was not accurate enough, and some visual differences between displays can be seen with the
human eye.
Once a display has been calibrated, the Visual Trim button will be enabled in the Actions panel.
Note: It is best to evaluate screen matching when displaying a white screen. Use the Test
Pattern panel to select the Calibrated White or Visual Trim+Calibrated White patterns.
The white point and brightness of the display can be interactively adjusted using the various controls from within the
Visual Trim dialog.
Three different types of controls are
available, but they all accomplish the same
function.
• By Color Circle - The color of
display can be adjusted by dragging the
blue ball control around the color circle.
The color tint of the display will change
towards the color under the ball position.
The keyboard arrow keys can be used to
move the ball if more precision is needed.
The brightness of the display can also be
adjusted using the Color Circle Brightness
slider control. This adjustment is made
by scaling the red, green and blue video
levels. It does not adjust the brightness of
the LCD backlight.
• By Color Cast buttons - Clicking
the button that best represents the color
cast on the display compared to others,
will adjust the display to reduce that cast.
Each adjustment is small, so several may
be necessary to make larger changes.
• By RGB Percentage - Adjusting these values changes the ratios of the red, green and blue on the display.
Visual Trim button - Opens the Visual Trim dialog.
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