Magnus MIPS, Instructions Manual

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20
Back Light Compensation (BLC)
Under normal lighting conditions, with the electric Iris control activated, the camera will automatically
adjust the image brightness so that all parts of the image are visible.
However, when the background illumination is very bright, the shutter speed will automatically be
reduced causing the foreground image to become darkened. With the image darkened in this way,
images may appear almost in silhouette making it difficult to see any detail. In this situation, Back Light
Compensation (BLC) can be used to increase the brightness of certain parts of the image.
Back Light Compensation effectively limits the area of the screen in which the AGC operates, thus
ensuring that details within the area will not be lost. As a consequence, regions of the image outside of
the BLC area may become very bright and washed out.
To enable BLC simply click on the BLC Check box. To display and / or change the BLC area, click on
the On Screen Display box. An 8 x 8 grid will appear over the image with a red box drawn around the
active BLC window. To move the BLC window, you can either drag it with the mouse, or enter the x and
Y co-ordinates in eth control panel. The size of the BLC window can be selected from the control panel,
and can vary in both size and shape. The level of BLC can be adjusted using the WEIGHT function on
the control panel.
Important:
BLC will only function when the shutter speed is set to "Electric Iris".
The affect of Back Light Compensation is shown in Figure.
MIPS
Using The Control Panel