National Instruments IMAQTM User Manual page 109

Glossary
NI-IMAQ
nonlinear filter
nonlinear
gradient filter
nonlinear Prewitt filter
nonlinear Sobel filter
Nth order filter
number of planes
(in an image)
O
OCR
OCV
offset
opening
operators
IMAQ Vision for Visual Basic User Manual
The driver software for National Instruments IMAQ hardware.
Replaces each pixel value with a nonlinear function of its surrounding
pixels.
A highpass edge-extraction filter that favors vertical edges.
A highpass, edge-extraction filter based on two-dimensional gradient
information.
A highpass, edge-extraction filter based on two-dimensional gradient
information. The filter has a smoothing effect that reduces noise
enhancements caused by gradient operators.
Filters an image using a nonlinear filter. This filter orders (or classifies)
the pixel values surrounding the pixel being processed. The pixel being
processed is set to the Nth pixel value, where N is the order of the filter.
The number of arrays of pixels that compose the image. A gray-level or
pseudo-color image is composed of one plane, while an RGB image is
composed of three planes (one for the red component, one for the blue,
and one for the green).
Optical Character Recognition. The ability of a machine to read
human-readable text.
Optical Character Verification. A machine vision application that inspects
the quality of printed characters.
The coordinate position in an image where you want to place the origin of
another image. Setting an offset is useful when performing mask
operations.
An erosion followed by a dilation. An opening removes small objects and
smooths boundaries of objects in the image.
Allow masking, combination, and comparison of images. You can use
arithmetic and logic operators in IMAQ Vision.
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