Dalsa Genie HM640, User Manual

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Operational Reference Genie HM-HC Series-GigE Vision Camera
Partial Scan (horizontal cropping)
Genie also can crop the acquisition horizontally by grabbing less pixels on each horizontal line. Additionally a
horizontal offset value will start the grab from any pixel count, as shown in the following figure. Note that
horizontal cropping does not increase the maximum frame rate due to the CMOS sensor architecture.
Horizontal Crop
Horizontal Scan offset Active Horizontal Scan
Window ROI
Vertical and Horizontal Cropping can be combined to grab only a region of interest (ROI). Besides eliminating post
acquisition image cropping done by software in the host computer, a windowed ROI grab reduces the bandwidth
required on the Gigabit Ethernet link since less pixels are transmitted. See
" CamExpert Image Buffer and ROI
Parameters " on page 44 to use CamExpert to configure image cropping.