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Video Subtractor,
Video Comparator,
Video Image Comparison - 442 Series
Now Available for High-Definition!
The Model 442 Video Subtractor & Video Comparator allows the user to subtract or compare two video images.
The unit performs a video image comparison by subtracting the image stored in its memory from the active picture
at its input. Comparison (subtraction) of two live video streams is also possible. It is intended for use in inspection, registration, interferometry, quality control, surveillance
and other applications where an easily viewed comparison of two video images can be used for decision making or
process control.
The Video Subtractor & Video Comparator has two switch-selectable output modes. One provides the difference
plus 0.5. The other provides the absolute value of the difference. Additionally, a switch is provided to invert
the output thereby showing the reference minus the input instead of the input minus the reference. A "Difference
Threshold" control allows adjustment of the unit's sensitivity to differences.
An additional operational mode allows subtraction of each video frame from the previous frame to provide
"frogs eye" capability to display only motion in the scene being monitored by the input video camera.
Features
All Units: Video Subtractor, Video Comparator, Video Image Comparison
Subtracts Stored Reference Image from Real-Time Input or Vice Versa
Displays Absolute Value of Difference
Displays Difference + 0.5
Freeze Frame Function can Store a Reference Image
Adjustable Difference Threshold
Motion Detection Mode ("Frog's Eye" View)
NTSC Color
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Model 442CS: Video Subtractor, Video Comparator, Video Image Comparison
Desktop Style ABS Chassis
5 VDC Power (120 VAC Adapter Included where appropriate)
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Model 442C: Video Subtractor, Video Comparator, Video Image Comparison
Aluminum Chassis, Optionally Rack-Mountable
120 VAC or 240 VAC Power Input (Specify when Ordering)
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