Enhancing The Vertical Resolution (Super-V Mode); Improving The Low Luminance Reproduction (Black Stretch/Black Press) - Ikegami Editcam 3 DNS-33W Operation Manual

5.3 Enhancing the Vertical Resolution
(Super-V mode)
Super-V function enhances the vertical resolution.
Notice
• The sensitivity of camera decreases when in
Super-V function mode.
• When a remote controller is connected, the
operation of the remote controller has priority over
the operation switches on the camera.
Reference
For details on how to operate the various remote
controllers, refer to the instruction manuals attached
to the remote controllers.
ON
OFF
SHUTT/SUP-V
MENU
AUDIO OUT
VTR
Camera Front Side
1. Display characters to check the current setting information
on the VF, by setting "DISPLAY MODE" from the Menu
(Normal Menu or Maintenance Menu) to "1" or "2".
Setting Value
OFF
Turns off the character display.
1
Displays characters for approximately 2 seconds
after operation of any switch.
Displays characters at all times.
2
Reference
For details on the settings, refer to "5.10.3 VF
DISPLAY (Selecting various status display modes on
the VF)", " DISPLAY MODE".
2. Set the SHUTT/SUP-V switch to "ON".
3. Select Super-V mode by pressing the SET button.
Pressing the SET button switches the modes in the order
of Preset Shutter, Variable Shutter and Super-V.
4. Set the SHUTT/SUP-V switch to "OFF" to turn off the
Super-V function.
SHUTT/SUP-V Switch
ON
AWB
OFF
ABB
Rotary Pulse Switch
Description
DNS-33W 0503 VOL1 (E)
5. SETTINGS AND ADJUSTMENT OF CAMERA
5.4 Improving the Low Luminance
Reproduction
(Black Stretch/Black Press)
Black Stretch
The human eye has a much greater dynamic range than a TV
camera. Even if the subject has a significant contrast, the eye
can capture the details in both light and dark parts to a
certain extent. On the other hand, if a TV camera focuses its
iris to the lighter part, the darker (low luminance) part tends
to turn black, and it is difficult to reproduce the subject as a
clear image. Black Stretch is a function that raises only the
low luminance parts of the subject to a distinguishable light
level, to minimize the blackening as shown in the figure
below.
100%
Output
0%
Subject Luminance
Since only the luminance signals are processed with the
Black Stretch function, the color difference signals are not
affected at all, unlike the case when the gamma curve was
varied. Therefore, the blackening of the low luminance parts
is improved while maintaining the color reproducibility level.
γ
R
γ
G
γ
B
Black Press
Using the Black Press function, the low luminance part can
be made darker. This function is effective when the main
subject is light with a dim background: it emphasizes the
lighter part and darkens the background. Also, when shooting
paintings and photographs, the Black Press function can
minimize the light reflection to reproduce the black part
naturally. The change in luminance level caused by the Black
Press function is shown in the figure below.
100%
Output
0%
Subject Luminance
100%
Output
Black Stretch
47%
8.5%
0%
Subject Luminance
Change in Luminance by Black Stretch
Luminance
Signal
Black
Stretch
Luminance
Signal
Amplifier
Color Difference Signal
Block Diagram of Black Stretch
100%
Output
Black Press
47%
8.5%
0%
Subject Luminance
Change in Luminance by Black Press
5 - 3
Video Signal Output
DNS-33W