Dalsa C1240, User Manual

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Nano Series GigE Vision Camera Operational Reference • 191
Horizontal Cropping (Partial Scan)
Genie Nano supports cropping the acquisition horizontally by grabbing less pixels on each
horizontal line. Horizontal offset defines the start of the acquired video line while horizontal width
defines the number of pixels per line. Horizontal control features have the following independent
constants:
• Horizontal Offset is limited to pixel increment values of 4 to define the start of the video
line.
•
Horizontal Width decrements from maximum in pixel counts of 8 (i.e. the video width is in
steps of 8 pixels).
Using the Multiple ROI Mode
Genie Nano monochrome cameras implement the Multiple ROI mode (region of interest) features,
which allow having 2 to 16 smaller image ROI areas versus the single ROI area possible with
vertical and horizontal crop functions.
These multiple areas are combined as one output image, reducing transfer bandwidth
requirements, plus with the added benefit that any reduction of the number of vertical lines output
will result in a greater possible camera frame rate. This increased frame rate increase (written to
internal memory) is similar to using the vertical crop feature.