Black Shading Auto Setup; White Shading Auto Setup - Sony BVP-900 Series System Manual

4-19 Auto Setup
To execute from the menu operation block
of the MSU-700A/750
Press [Auto Hue] of the Skin Detail adjustment display
(page 4-79).
You can also execute Skin Detail Auto Setup using the
Auto Setup menu.
For the Auto Setup menu, see "4-19-7 Auto Setup With the
Auto Setup Menu."

4-19-5 Black Shading Auto Setup

Auto Setup for black shading can be performed using
the menu operation block of the MSU-700A/750.
Press [Auto B. Shading] of the Black Shading
adjustment display (page 4-34) or the Auto Setup
menu (page 4-101).

4-19-6 White Shading Auto Setup

Auto Setup for white shading can be performed using
the menu operation block of the MSU-700A/750. The
3D white shading compensation will automatically
activate when it is turned ON on the OHB File Setup
menu of the camera (page 5-10, 5-11).
For Auto Setup for white shading, a white subject is
required, and you can use two modes according to the
type of subject.
R, G, B mode
Use this mode when using a white subject that can
produce completely uniform illumination, such as a
porta-pattern box. In this mode, all R, G, and B
are automatically adjusted so that video signals
obtained from the object become flat. Note, however,
that if the white subject being used is not even, this
mode may cause irregularity in colors.
R, B Only mode
Select this mode if there is shading over the subject,
such as when using a paper sheet under ambient light.
In this mode, R and B are adjusted in reference to G.
R G
4-100
Chapter 4 Adjustments
B
R,G,B mode
R,B Only mode
Operating procedure
1
Shoot a white subject so that it occupies the entire
picture.
2
Select the mode according to the type of subject.
For the mode selection, use Auto White Shading
Mode on the CAM Mode Setting display.
For the CAM Mode Setting display, see "3-3-9 Initial
Settings of the Camera."
3
Adjust the IRIS lever or control and WHITE
controls so that the R, G and B video levels at the
center of the picture become 70 to 100%.
4
Press [Auto W. Shading] of the White Shading
adjustment display (page 4-52) or the Auto Setup
menu (page 4-101).
What is the 3D white shading compensation?
This 3D white shading compensation is a function to
compensate for shading by dividing the screen into a
grid and executing white shading compensation
independently for each grid block. This enables
compensation for shading in a diagonal direction or
shading in a certain block.
When 3D Shading is set to ON on the OHB File Setup
menu of the camera, 3D shading compensation is
simultaneously activated when White Shading Auto
Setup is executed. As this compensation becomes
more accurate if you repeat White Shading Auto
Setup, it is recommended to execute it three times or
more when it is done for the first time.
The compensation data will be lost when the camera is
turned off immediately after the compensation is made.
When you want to maintain the compensation data, be
sure to store them in an OHB file. The data in an OHB
file are maintained in the OHB unit even if the power
is turned off. As with the normal White Shading Auto
Setup, both R, G, B mode and R, B Only mode are
supported. If a sufficiently even white subject is not
available, use R, B Only mode. If an uneven subject is
used in R, G, B mode, this may lead to incorrect
compensation.
Depending on the IRIS setting, the lens being used
may affect the compensation. Do not perform the
compensation with the iris almost fully open (under
f4.0) or almost fully closed.
Flicker will cause poor results. If there is flicker, set
the camera to Shutter mode and perform the
compensation in a condition without flicker.