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Glossary
© National Instruments Corporation
G-11
luminance
.
LUT
Lookup table. A table containing values used to transform the gray-level
values of an image. For each gray-level value in the image, the
corresponding new value is obtained from the lookup table.
values of an image. For each gray-level value in the image, the
corresponding new value is obtained from the lookup table.
M
M
(1) Mega, the standard metric prefix for 1 million or 10
6
, when used with
units of measure such as volts and hertz.
(2) Mega, the prefix for 1,048,576, or 220, when used with B to quantify
data or computer memory.
data or computer memory.
machine vision
An automated application that performs a set of visual inspection tasks.
mask FFT filter
Removes frequencies contained in a mask (range) specified by the user.
match score
A number ranging from 0 to 1000 that indicates how closely an acquired
image matches the template image. A match score of 1000 indicates a
perfect match. A match score of 0 indicates no match.
image matches the template image. A match score of 1000 indicates a
perfect match. A match score of 0 indicates no match.
MB
Megabyte of memory.
median filter
A lowpass filter that assigns to each pixel the median value of its neighbors.
This filter effectively removes isolated pixels without blurring the contours
of objects.
This filter effectively removes isolated pixels without blurring the contours
of objects.
memory buffer
MMX
Multimedia Extensions. An Intel chip-based technology that allows
parallel operations on integers, which results in accelerated processing
of 8-bit images.
parallel operations on integers, which results in accelerated processing
of 8-bit images.
morphological
transformations
transformations
Extract and alter the structure of objects in an image. You can use these
transformations for expanding (dilating) or reducing (eroding) objects,
filling holes, closing inclusions, or smoothing borders. They are used
primarily to delineate objects and prepare them for quantitative inspection
analysis.
transformations for expanding (dilating) or reducing (eroding) objects,
filling holes, closing inclusions, or smoothing borders. They are used
primarily to delineate objects and prepare them for quantitative inspection
analysis.
M-skeleton function
Uses an M-shaped structuring element in the skeleton function.