Smart Cameras for Embedded Machine Vision
National Instruments vision software includes hundreds of image
processing and analysis functions. A subset of the tools available in the
Vision Development Module and Vision Builder AI are shown below.
Bar Code Reader and Grader
Pattern and Geometric Matching
Learn and locate objects and patterns in your
images. The National Instruments patented
matching algorithms locate patterns fast with
very high accuracy.
Read 1D bar codes as well as 2D codes like Data
Matrix and PDF 417. You can decipher codes
applied through ink jets, thermal transfer, laser
etching, or dot peen.
Spatial Calibration
Optical Character Recognition/Verification
Using spatial calibration functions, you can
calibrate your image to take accurate, real-world
measurements from images, regardless of camera
perspective or lens distortion.
NI OCR functions use a trainable OCR algorithm
specifically designed to identify and verify all
types of fonts, characters, and symbols despite
poor and inconsistent image quality.
Image Arithmetic and Logic Functions
Operators perform basic arithmetic and logical
operations on images. Use operators to add,
subtract, multiply, and divide an image with other
images or constants.
Particle Analysis
Use particle analysis to detect connected regions
or groupings of pixels in an image and make
selected measurements of those regions. Choose
from more than 80 unique measurements that
return data in both real-world and pixel values.
Coordinate Systems
Color Inspection
Set up coordinate systems to ensure that all your
measurements move with the object within the
field of view.
Color matching quantifies which colors and how
much of each color exist in a region of an image
and uses this information to check if another
image contains the same colors in the same ratio.
Edge Detection
Image Filters and Frequency Analysis
Frequency filters, such as the fast Fourier
transform (FFT), alter pixel values with respect to
the periodicity and spatial distribution of the
variations in light intensity in the image.
Use the edge detection tools to identify and locate
discontinuities in the pixel intensities of an image.
Find edges to align, measure, or detect features in
the image.
Object Classification
Image Segmentation
Classification is a tool for identifying an unknown
object by comparing its significant features to a
set of features that represent known samples.
NI vision software comes with several options to
segment and partition images into related components.
Segmentation is an important part of many imaging
applications that need to extract certain features or
objects in order to process them further.
Gauging
Golden Template Comparison
Use dimensional measurement or gauging tools to
obtain quantifiable, critical distance measurements
such as distances, angles, areas, line fits, circular
fits, and counts.
Find defects in an image by comparing a perfect
(golden) sample to all subsequent samples. Golden
template comparison detects surface defects, label
misprints, and overall quality issues.
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