White Balance; Black Balance [Xcl-5005Cr]; Black Balance Automatic Adjustment Method; Black Balance Direct Adjustment Method - Sony XCL-5005CR Technical Manual

6.5.2.

White balance

When PIXEL-GAIN=1, configure each mode with
WBMODE. You can select the color temperature from
3200 K, 5600 K, 6500 K, and manual. The setting is
3200 K at the time of shipment. One push white balance
works to automatically adjust the color in accordance
with AUTOWB.
AUTOWB has two modes. AUTOWB=0 measures the
light and sets the pixel gain for each of the areas to the
left and right of the center. At this time, the size of the
measurement area is 512 × 256 pixels. AUTOWB=1
allows a measurement area of 256 × 256 pixels to be set
with arbitrary position on the screen, but the difference
on the left and right of the boundary can sometimes be
seen after AWB execution. To reduce color level
differences between the left and right of the boundary
after AWB execution, use AUTOWB=0 of instead or
finely adjust the pixel gain for the left and right
individually so that there is no color level difference
between the left and right of the boundary. Specify the
position on the upper left of the measurement frame to
select the measurement area. You can execute
AUTOWB in any mode other than partial scan.
AUTOWB Measurement
area
0 Fixed
1 Arbitrary setting Sets the pixel gain for a
512
2048 256
You can execute AUTOWB regardless of the settings
configured for pixel gain and white balance mode. After
execution, the settings will automatically be configured
to PIXEL-GAIN=1 and WBMODE=3 (manual).
To adjust white balance properly, the appropriate
brightness level is necessary. An ideal situation, for
example, would be when the image output level is 80%
to 100% with a 12-bit output setting and 3000 steps to
30
6. DSP Operation
White balance setting
Measures the light in a fixed
center area and then sets the
pixel gain. With this setting, a
color level difference is least
likely to be visible between the
left and right of the boundary.
specified measurement area.
With this setting, a color level
difference may be visible
between the left and right of the
boundary.
Specified position
256
256
Measurement
area of
AUTOWB=1
(arbitrary
setting
Measurement area
possible)
of AUTOWB=0
(fixed)
2446
3760 steps setting. If the image output level is too low or
too high, an error will occur and white balance will not
be performed.
Note
About specifying the coordinates for the AUTOWB=1
(arbitrary setting) position
Specify an even number between 0 and 2192 for the
horizontal position.
Specify an odd number between 1 and 1793 for the
vertical position.
Specifying numbers outside of these ranges or
specifying invalid numbers will result in an error.
6.6. Black balance
[XCL-5005CR]
Configure this setting with BBALANCE. You can adjust
the black clamp level when PIXEL-GAIN=1. There is
an automatic adjustment method for calculating the
black balance from the OB (Optical Black) pixel value
and a direct method that allows you to set the black
balance for the left and right areas individually.
6.6.1. Black balance automatic
adjustment method
When BBALANCE=1 is set, the method is automatic
adjustment method. Since the black clamp level is set to
a value which is the pixel level value of the OB area after
correction has been applied, the black clamp level is
linked to exposure and can be set automatically. The
optimal value is set at the time of shipment. Since the
pixel gain is controlled if the correction amount is set to
the + side and the clamp operates in the disengage
direction if the correction amount is set to the – side, the
black level increases when the pixel gain value becomes
high.
Black clamp level = OB calculation value + correction
value (–1023 to +1023)
The correction amount can be set for the left and right
areas individually, except when automatic correction
function (automatic clamp control) is set to ON (AUTO-
DCLAMP=1).
6.6.2. Black balance direct adjustment
method
When BBALANCE=2 is set, the method is direct
specification adjustment method. This method is for
directly specifying the black clamp level.
Black clamp level = specified value (0 to 2047)
You can set the areas on the left and right individually.
When the pedestal of AFE is changed, this value
changes because it is linked.