WolfVision VZ-C30 User Manual - Handbuch (Seite 8)

7
IMAGE TURN MODE (for higher resolution)
Picking up a complete vertical (portrait) document or
A4 page has always been a critical issue for a
Visualizer, because the image is always picked up in
a horizontal (landscape) format.
The camera could only use 50% of its pixels to pick
up a vertical (portrait) page. WolfVision's
Image turn
mode solves this problem.
Just place your document (or other vertical object)
º
on the working surface horizontally and zoom in on it
completely, so that about 90% of the pixels of the built-in camera are used to pick up the document.
Then press the
IMAGE TURN-key (#15). The Visualizer turns the picture electronically 90 and outputs
it the right way up with a much higher resolution than in normal mode. The left and right margins are
black.
A
A
A A
Working surface: Output picture:
Normal mode:
Image turn mode:
Only 50% of the
pixels are used to
pick up the document
90% of the pixels
are used to pick
up the document
WHITE BALANCE ADJUSTMENT
IMPORTANT
Correct white balance adjustment is important for an exact color reproduction!
This means that the white
balance is continuously adjusted automatically.
For an exact white balance, at least 10% of the recorded image should be white (measurement area is
the center of the image).
For a precise fixed white balance adjustment use the "One Push" white balance. This can be done by
pressing the
LIGHT-key (#18) for 2 seconds. When the white balance is stored an on-screen message
appears. Setting a "One Push" white balance switches off the "Auto Tracking" mode (When the unit is
switched off and on again the "Auto Tracking" mode will be reactivated).
For specialists: The Visualizer can be switched between "Auto Tracking", "One Push" and "Manual" white balance mode in the on-screen
menu (see page 9). If you work with negative transparencies and a light box, use a blank (black in the image) part of the negative film for
white balance adjustment! The "one Push" white balance will be separately adjusted and stored for top light and external light.
Each time the lighting condition changes, the Visualizer's camera must readjust its white balance, in
order to optimize the color reproduction. The lighting condition (color temperature) changes, for
example, if changing between Visualizer's light and an external lightbox (bottom light) or if room light is
turning on or off.
The standard settings of the Visualizer are the following:
When the Visualizer's light is switched on: fixed white balance.
When the Visualizer's light is switched off: "auto-tracking" white balance.
Normally there is no need for a manual white balance adjustment. However, if the colors on the screen
still appear to be wrong, the white balance can be adjusted manually (one-push):
Hints to perform an One-Push white balance:
Top light: Zoom in on a white object (i.e. a sheet of paper) until there is only white on the screen,
press the LIGHT-key (#18) for 2 seconds.
Lightbox with transparencies: Turn off the light of the Visualizer with the LIGHT-key (#18) and
switch on the lightbox. Remove everything from the light box and zoom to the smallest picture size
until there is only white on the screen, press the
LIGHT-key (#18) for 2 seconds.
Lightbox with x-rays: Turn off the light of the Visualizer and switch on the lightbox. Place an x-ray on
the light box and zoom out until the whole x-ray is picked up, press the LIGHT-key (#18) for 2
seconds.
Please note: False colors can also be due to wrong color settings of your projector or monitor. It is
recommended to adjust the white balance of the Visualizer at first and if the results are still not
satisfactory, monitor or projector should be checked.
LIGHT
18