image-engineering

FVCML0208 10

lightSTUDIO

A device to reproduce a natural scene under constant and defined lighting conditions

Test charts are used to test digital cameras and to perform
objective measurements. But there are certain aspects in testing
a camera that require a real scene. One of these aspects is the
correct white balancing for different types of illuminants. another
aspect might be the determination of the visual loss of detail due
to noise reduction or the amount of noise in an image. You can do
tests with real scenes for yourself, but how to make these tests
comparable over time? Or between different work groups when
they are located in different parts of the world?

We have developed the lightSTUDIO to make this possible. It
provides the standard types of illumination and is large enough
to illuminate a whole table top scene. It also allows remote
control and the dimming of the lights from a PC using a USB interface.

basic lightStudio

Basic lightSTUDIO

In order to get a worldwide comparison between labs the lightSTUDIO comes with the entire interiour shown on the picture below. Each object was carefully chosen based on our experience in camera testing and can provide you interesting information about your camera system.

In 2012 the lightSTUDIO with its interior objects and the switchable light sources has developed to one of our top selling products. It is well on the way to becoming the industry standard for a camera test scene that can be illuminated with 6 different light sources at adjustable light levels.

BASIC lightSTUDIO
Supply voltage	220 – 240 V, 50/60 Hz
Outer dimension w / h / d	130 x 80 x 80 cm
Inner dimension bottom plate w / d	125 x 75 cm
Height of the area for a test scene	60 cm
Weight	ca. 45 kg
USB interface	USB 1.1

BASIC FEATURES OF THE lightSTUDIO

usb dimmable illuminants interiour

coming -soon Features

Optional LED light head
Now we have gone even further. Starting appr. late summer 2013
the light head can be exchanged for an lEd based one that uses
20 narrow band lEd channels and 2 white lEd channels to
spectrally match almost every standard light source. The lEds
are combined to units of 80 lEds on a 10 x 10 cm area and a
multiple of these can be combined to form larger light sources.

Optional moving targets (with rack)
Most devices feature still photography and video functionality
nowadays. In order to compare compression technologies,
artifacts, motion blur and other aspects in video the lightSTUDIO
can be equipped with moving targets. One of these is a
horizontally moving frame that can hold a variety of targets
including a dead leaves or a slanted edge one. The speed of the
motion is adjustable up to 3 m/s.
A second movable section is a rotating plate on the back wall
of the box which also allows for adjusting the speed (up to 600
rpm). It can carry a sector chart or any kind of custom chart. In
order to stabilize the whole setup with moving parts the option
for moving targets also comes with a rack, on which the box is
mounted.

moving lightSTUDIO

Moving chart in the center

HDR option
Another aspect that is important for modern digital cameras
is the ability to capture high contrast scenes. In order to really
create a high contrast scene it is necessary to add some back
illuminated test patterns or images to the box. Two LG2 light
boxes with transparent charts are used for this purpose. In order
to avoid stray light, which reduces the contrast in the foreground,
the light boxes are placed in the back of a surrounding black box.
This box is inserted in the center part of the back wall of the
lightSTUDIO. That way contrast ratios of more than 10.000:1 can
be reached.

HDR lightSTUDIO

HDR Modul in the center