In order to obtain result images from the raw image of the sensor (see chapter Technical Basics), it is
usually necessary to calculate them on a host PC with appropriate image processing libraries. Only with
these result images can polarization properties, such as polarization degree or angle, be used for fur-
ther evaluation.
NET has integrated the Sony IMX264MZR polarization
sensor into the GigEPRO camera. The special feature
of the GigEPRO camera is that own algorithms can al-
ready be processed in the camera thanks to the NET
Open Camera Concept. This makes the GigEPRO ideal
for moving the calculation of the result images from
the host PC to the FPGA of the camera. This means
that no additional software library is required for
the calculation and the result images can be output
directly from the camera. This saves development
effort, CPU computing power and software costs.
Depending on the requirements, different output
images can be selected. The best known of these
are the DoLP (Degree of Linear Polarization) mode,
in which the degree of polarization is stored in the
image as a gray value. The other is the AoLP (Angle
of Linear Polarization) mode, in which the angle is
stored in the gray value of the result image. Addi-
tionally, there is the possibility to output different
false color modes, in which these properties are
more visible to the human eye and therefore more
suitable for a first viewing. Furthermore, there is a
mode in which reflections are suppressed and thus
an image with as few reflections as possible is di-
splayed. If an own calculation of the result image
is desired, the raw images as well as Stokes images
can of course also be output. The different output
images as well as the underlying processing will be
explained in more detail in the following section.
3.0 Solution with GigEPRO camera platform
3.1 GigEPRO with Sony IMX264MZR
Technical data:
Image sensor: IMX264MZR
Resolution: 2464 x 2056
Format: 2/3“
Pixel size: 3,45 μm
Frame rate: 23 (Mono 8), 8 (RGB 8)
Shutter: Global |
