User`s manual

Basic Operation & Standard Features

BASLER A600f 3-23

DRAFT

Once the conversion to YUV is complete, pixels are transmitted from the camera in the YUV

(4:2:2) format as defined in Section 2.1.3

Video Data Payload Structure in the 1394-based Digital

Camera Specification Version 1.30.

3.7.1 White Balance

White balance capability has been implemented on the A600fc. With white balancing, correction

factors can be applied to adjust the color balance in the images transmitted from the camera.

The U_Value_or_B_Value field of the White_Balance control register (see page 4-9) can be used

to vary the amount of blue in the captured images. The setting for the field can range from 16

(0x10) to 255 (0xFF). If the field is set to 64 (0x40), it will have no effect on the image. If the field

is set to a value lower than 64, the image will be less blue. If the field is set to a value higher than

64, the image will be more blue. The default setting for the U_Value_or_B_Value is 112 (0x70).

To determine the effect of this field on the captured images, use this formula:

The V_Value_or_R_Value field of the White_Balance control register can be used to vary the

amount of red in the captured images. The setting for the field can range from 16 (0x10) to 255

(0xFF). If the field is set to 64 (0x40), it will have no effect on the image. If the field is set to a value

lower than 64, the image will be less red. If the field is set to a value higher than 64, the image will

be more red. The default setting for the V_Value_or_R_Value is 64 (0x40).

To determine the effect of this field on the captured images, use this formula:

The values for U and for V normally range from -128 to +127. Because the 1394 Dig-

ital Camera specification requires that U values and V values be transmitted with un-

signed integers, 128 is added to each U value and to each V value before the values

are transmitted from the camera. This process allows the values to be transmitted on

a scale that ranges from 0 to 255 (for more information, see Section 2.1.4

Data Struc-

ture

in the 1394-based Digital Camera Specification Version 1.30).

When an

A600fc is operating in a YUV (4:2:2) mode, the average number of bits per

pixel is 16. This means that the camera will require twice the bandwidth of a camera

operating in an 8 bit monochrome mode.

The

A600fc can operate in several YUV (4:2:2) color modes and can also operate in

several monochrome 8 bit modes (see Section 3.13).

Blue Gain

U_Value_or_B_Value field Setting

------------------------------------------------------------------------------------------=

Red Gain

V_Value_or_R_Value field Setting

------------------------------------------------------------------------------------------=