National Instruments IMAQTM Manual De Usuario

© National Instruments Corporation

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.

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.

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.

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.

morphological 
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.

M-skeleton function

Uses an M-shaped structuring element in the skeleton function.

neighbor

A pixel whose value affects the value of a nearby pixel when an image is 
processed. The neighbors of a pixel are usually defined by a kernel or a 
structuring element.

neighborhood 
operations

Operations on a point in an image that take into consideration the values of 
the pixels neighboring that point.