Image Format Control; Region Of Interest (Roi); Multiple Regions Of Interest - Photon Focus Gpixel MV8 Series User Manual

Image Format Control

The focus on the interesting parts of an image can be set by setting the region of interest (ROI)
(see Section 9.1).
The ROI influences the image size which leads into an increased frame rate (see Chapter 10 for
more information about the available frame rate).

9.1 Region of Interest (ROI)

Some applications do not need full image resolution. By reducing the image size to a certain
region of interest (ROI), the frame rate can be increased. A region of interest can be almost
any rectangular window and is specified by its position within the full frame and its width (W)
and height (H).
In MV4-D9344(C)-G01 cameras, the ROI width must be a multiple of 16 and the
X offset must be a multiple of 16.
In MV4-D9344(C)-G01 cameras, the ROI height and Y offsset can be set in incre-
ment of 1.
In MV8-D8424(C)-G01 cameras, the ROI width must be a multiple of 8 and the X
offset must be a multiple of 16.
In MV8-D8424(C)-G01 cameras, the ROI height and Y offsset can be set in incre-
ment of 1.

9.2 Multiple Regions of Interest

The Photonfocus Gpixel GigE camera series can handle up to 16 different regions of interest.
This feature can be used to reduce the amount of image data and increase the frame rate. An
application example for using multiple regions of interest (MROI) is a laser triangulation system
with several laser lines. The multiple ROIs are joined together and form a single image, which
is transferred to the acquisition device.
An individual MROI region is defined by its starting value in y-direction and its height. The
starting value in horizontal direction and the width is the same for all MROI regions and is
defined by the ROI settings. The maximum frame rate in MROI mode depends on the number
of rows and columns being read out. Overlapping ROIs are not allowed and no row must be
read out more than once.
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