### BLC

You can use the backlight compensation (BLC) function to make the subject easily visible under strong backlight conditions.

OFF: | Disables the backlight compensation function.
MULTI: | Selects the multi-spot evaluative metering mode.
CENTER: | Selects the center-weighted evaluative metering mode.
MASKING: | Selects the light source masking mode.

The configured settings will be applied to “CAM1” or “CAM2”, whichever you selected under [VIEW].

#### Configuring Multi-Spot Evaluative Metering Mode (MULTI)

Multi-spot evaluative metering compensates for the backlighting problem by evaluating the photometry of the entire screen.

1In [BLC], select “MULTI”.
2In [BLC WEIGHT], select the backlight sensitivity.

0 (low sensitivity) to 15 (high sensitivity)

3In [BRIGHT], select the compensation level for the brightness of the backlighting and click SET.

0 (low brightness compensation) to 15 (high brightness compensation)

#### Configuring Center-Weighted Average Metering Mode (CENTER)

Center-weighted average metering compensates for the backlighting problem by measuring the photometry of the specified area intensively.

Configure the position and size of the center metering area.

1In [BLC], select “CENTER” and click SET.

The BLC center/window weighting setting screen appears, showing a rectangle representing the center metering area in the center of the screen.

2Drag the rectangle to set the center metering area in position.

Center-weighted average metering may not be set depending on the position of the center metering area.

3Resize the center metering area.

To resize the center metering area, place the mouse pointer over the border of the area and then drag it.

4Configure the metering weight values for the four surrounding metering areas (TOP, BOTTOM, LEFT, and RIGHT).

Select a weight value for each of these metering areas depending on the installation environment.

0 (minimum) to 7 (maximum)

The weight value for the center metering area ([CENTER]) is fixed to “7”. You cannot change this value.

The brightness value represents the weight for each area and therefore does not affect the actual live video image from the camera.

5Click SET and then BACK.

The settings are saved and you return to the sub menu.

#### Configuring Light Source Masking Mode (MASKING)

You can use light source masking to compensate for backlighting problems with human or other objects in the subject, by masking the light source in a bright background.

1In [BLC], select “MASKING” and click SET.

The BLC masking screen appears.

2Drag the mouse over the live video image to select the area you want to mask.

The masked area is indicated by blue-bordered grid cells each containing the letter “M”.

You can mask more than one portion of the live image.

You can click one grid cell after another to set or cancel the masked area cell by cell.

To deselect a block of grid cells in the masked area, right-click one of grid cell and drag the mouse.

3Click SET and then BACK.

The settings are saved and you return to the sub menu.