Genie_TS_Series GigE Vision Camera
Operational Reference
97
Using Flat Field Correction
When using CamExpert, from the menu bar enable Flat Field correction
(Pre-Processing • Flat Field Correction • Hardware). Now when doing a live grab or snap, the
incoming image is corrected by the current flat field calibration data for each pixel.
Use the CamExpert menu function Tools • Flat Field Correction • Load to load in a flat field
correction image from previously saved calibration data. CamExpert allows saving and loading
calibration data for all cameras used with the imaging system.
GigE Vision application implement features as described in the section
controls.
Image Compression Mode (JPEG) Controls
Image Compression requires the JPEG Design firmware. This is an advanced processing design to
provide JPEG image accelerated compression, maximizing video frame transmissions over the
Ethernet network. Smaller compressed images take less network bandwidth allowing multiple
cameras (connected via a switch) on a network to efficiently transmit video frames to the host
system.
The user uploads the new firmware using the
CamExpert.
Enable Compression (
ImageCompressionMode
) to enable the embedded JPEG mode. When
compression is Off, the camera output stream is identical to the images when the default
Standard design firmware is loaded.
The Compression Rate feature (
ImageCompressionRateOption
) is currently set to Fixed Quality,
where the output image has a non-varying quality. Alternative image quality options may be
available in the future.
The Compression Quality feature (
ImageCompressionQuality
) allows the user to choose the
degree of compression, set by a number within the range of 1 to 99. The value 99 sets
minimum compression where typical images are compressed by a factor of 2. The value of 80
still provides reasonable image quality, but lower values visibly trade off image quality for
smaller image sizes.
The JPEG Format option (
ImageCompressionJpegFormatOption
) defines the active format as
BaseLine Standard; a common industry JPEG format.
The JPEG compression process is within the Genie TS (via the JPEG Design firmware). The
images output are complete with the required jpeg metadata. Any captured and saved image
when using the CamExpert tool, simply needs its file extension changed to “jpg”, where then it
is readable by any image viewer or editor.
The CamExpert tool in Sapera LT 7.50 (or later) supports decoding the captured JPEG directly.
The host software must account for the variable timing between data packets coming from the Genie TS by
increasing the Inter-packet timeout feature value. The Sapera package automatically increases the feature
value, while third party GigE Vision Host software must be adjusted by the user. See the section “
Inter-
Packet Timeout with JPEG Designs” in the “Teledyne DALSA Network Imaging Module for Sapera LT” manual
for additional information.
