Toshiba IK-WB21A User Manual

●

The Auto mode may not be effective if lighting is insufficient and the object
is dark.  In this case, increase the camera sensitivity (high limit values of
AGC and slow shutter) or set white balance to the Fixed mode.

●

White balance may not be optimal depending on the type of fluorescent
lamp even when shooting indoors (fluorescent lamp), in which case change
to other setting.

●

White balance may not be optimal in the Auto mode under a sodium vapor
lamp.  In this case, set the AWB control range to wide or to the Manual mode
referring to "AWB Control Range."

● WB Manual GAIN - R, WB Manual GAIN - B

Set a gain for a white balance in the Manual mode.  Match the white
balance by operating R gain and B gain.
Increase the value to increase the set gain and reduce the value to
reduce the set gain.

● AWB Ye/Cy Offset, AWB Mg/G Offset

Set the white balance offset.  In the Auto mode of white balance, offset
the convergent point of white balance in the direction of a preset color,
to obtain a desired color tone.
Ye/Cy Offset:

The convergent point shifts to the yellow side when

the value is increased toward the plus side, shifting
to the cyan side when increased toward the minus
side.

Mg/G Offset:

The convergent point shifts to the magenta side when
the value is increased toward the plus side, shifting
to the green side when increased toward the minus
side.

● AWB Range

Set the control range of white balance in the Auto mode.
Standard: The operating color temperature range is approx. 2500K to

approx. 7000K.

Wide:

The operating color temperature range is approx. 2200K to
approx. 9000K.

●

A wide setting may cause an unnatural hue of the image.

● Auto Gain Control

Set a maximum value for operational gain of the auto gain control cir-
cuit.  Set to maximum if the object is too dark and camera sensitivity is
low.
The camera sensitivity increases in the order of "OFF," "standard" and
"Max"  Noise also increases when Auto Gain Control is near maximum.
Lighting is recommended to obtain good image quality.

●

If sensitivity is still short after setting Auto Gain control, set the high limit
value of the slow shutter and auto B/W function, to further increase sensitivity.

Operating color

temperature

range varies

within AWB

control range.

Optimum white

balance is

achieved at color

temperature of

approx. 3000K.
Optimum white

balance is

achieved at color

temperature of

approx. 4000K.
Optimum white

balance is

achieved at color

temperature of

approx. 5200K.

Adjust while

checking on a

monitor or a

vector scope.

Auto (AWB)

Indoor

(Incandescent

light color)

Indoor

(Fluorescent

light color)

Outdoor

(Sun light)

Hold

Manual

 Operation Mode

Overview

Characteristics

Remarks

Camera

automatically

measures color

temperature

and sets white

balance.
Optimizes white

balance under

illumination of

an incandescent

lamp.
Optimizes white

balance under

illumination of a

fluorescent

lamp.
Optimizes white

balance under

solar lights in

outdoors.

Maintains

current white

balance.
Manually adjust

R (red) and B

(blue) levels

while

photographing

a white object.

Camera

automatically

tracks color

temperature

variations and sets

white balance.
Effective in

environment

where illumination

conditions are

constant.
Effective in

environment

where illumination

conditions are

constant.
Effective when

incandescent

lighting is not

used.

Effective when

wishing to fix in

current status.
Artificially sets

according to

the object and

is effective in

environment

where precision

is high and color

temperature

varies less.

● Auto B/W

Configures Auto black and white function. Auto B/W is the func-
tion to gain sensitivity by turning to B/W automatically when it
becomes dark. The image may have some noise in B/W mode.
ON： Auto B/W takes action.
OFF： Auto B/W does not take action.

● White Balance (WB)

White balance adjustment is needed to obtain images of a correct

color tone.  The camera offers selection of a white balance mode -

auto white balance (AWB), fixed (indoor and outdoor), hold or manual.

In the Auto mode, the camera automatically accomplishes a white

balance.

The auto operating color temperature range is approx. 2500K to

approx. 7000K when "AWB Range" is set to standard and is approx.

2200K to approx. 9000K when "AWB Range" is set to wide.  WB

is automatically achieved in almost all situations, except when

the object is dark or un-white, in which case a good balance some-

times cannot be achieved.  In this case, set to the Fixed or Manual

mode.