Auto White Balance, Auto Black Balance And Auto Black Shading - Ikegami Editcam 3 DNS-33W Operation Manual

4 - 6 4. OPERATION
・L
STBY
・M
SAVE
・H
FIELDPAK GAIN OUTPUT
VF
CHARA
Camera Left Side
PUSH
GL IN TC IN
TC
VIDEO
AUDIO
OUT
MONITOR
PM
4.7 Auto White Balance, Auto Black
Balance and Auto Black Shading
Auto White Balance (AWB) and Auto Black Balance (ABB)
are functions which automatically set the white or black level
of the R, G and B signals. Following the Auto Black Balance
adjustment, Black Shading adjustment can also be
automatically performed.
DNS-33W
・A
CAM
・B
BARS
OFF
AWB
POWER
Set the OUTPUT SELECT
switch to "BARS"
PRESET
WFM (Wave Form Monitor)
100%
80%
60%
40%
20%
0%
-20%
WFM
DNS-33W 0503 VOL1 (E)
4.7.1 Auto White Balance
1. Use the AWB SELECT switch to select the memory (Ach
or Bch) in which to store the execution result.
Switch
A Ach memory
B Bch memory
OFF White balance adjustment is turned OFF, and the
level returns to the preset level (3200K).
Auto white balance is not executed when the
switch is set to this position.
CAUTION
If data is already stored in the channel A or B
memory selected, it will be overwritten, thus erasing
the previously stored data.
2. Shoot a subject which contains something white.
Make sure that the following conditions are satisfied:
• The white object must fill at least 10% of the screen.
• There must be no other subject with a higher level on
the screen than that of the subject used to obtain the
white level. For example, it may cause an operation
error if the sky is caught in the part of image screen.
• The video level of the object used to obtain the white
balance must be at least 30%.
3. Use the ND FILTER knob to set the filter which suits the
subject's brightness. Also, use the ECC FILTER SELECT
button to set the filter suitable for the color temperature
of the subject.
4. Set the lens iris in such a way that the video level is set
to a suitable level.
5. Set the AWB/ABB switch to "AWB".
Auto white balance is now activated.
6. Upon completion of auto white balance, "OK" appears on
the VF screen. A zebra pattern appears superimposed over
the white-balanced image. Ensure that the white balance
is performed on the intended subject.
If "NG" appears, the cause (CHG FILTER, etc.) is
displayed. Check whether the external subject satisfies the
conditions given in step 2 above and whether the filter
setting is appropriate, and then repeat the procedure
starting with step 2.
Description