Barco RLS W12 User Manual - page 49

RLS W12  02/12/2014

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8.Image

8.7  Input Balance

Regardless of the change in ambient light, the human eye is equipped with an automatic adjustment mechanism that makes 

a white object appears white and black object black. However, since no machine has such an incredible innate feature, you 

may need to make certain adjustments to the projector’s settings when the ambient light changes so that the image will 

appear closer to the actual colors.

the point where saturation

is reached needs to be same

for RGB

the point where CUT off 

for RGB is reached 

needs to be the same

White balance

adjust

black balance adjust

input

signal

0

255

Offset

This refers to the control of color imbalance in the darker areas of the projected image. It is recommended that you use an 

external test image with many areas of dark and gray colors (i.e. an image of 30IRE-window). If you notice minimal amount 

of red, green or blue in the gray areas, adjust the offset of the corresponding color accordingly. This function will shift the 

entire color spectrum for the whole image and change its brightness.

Gain

This refers to the control of color imbalance in the brighter areas of the projected image. It is recommended that you use an 

external test image with many areas of white (i.e. an image of 80IRE-window). If you notice minimal amount of red, green or 

blue in the gray areas, lower the gain of the corresponding color accordingly. This function is used to increase or decrease the 

range of color input for the entire image.  

Generally speaking, as gain increases, the contrast of the image will become lower. By increasing the offset, the image 

brightness will become lower.

Black Balance Offset

 This function involves the adjustment of the following red, green and blue offsets. The text itself is decorative.

• Red Offset 

Press     to adjust the offset of red in dark scales. 

• Green Offset 

Press     to adjust the offset of green in dark scales. 

• Blue Offset 

Press     to adjust the offset of blue in dark scales. 

White Balance

This function involves the adjustment of the following red, green and blue gains. The text  itself is decorative.

• Red Gain 

Press     to adjust the gain of red in bright scales.

• Green Gain 

Press     to adjust the gain of green in bright scales.

• Green Gain 

Press     to adjust the gain of blue in bright scales.