Machine Vision

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Machine Vision
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Image Acquisition gt Resolution Ability of a
scanning system to distinguish between 2 closely
separated points. gt Contrast Ability to
detect shades of difference from pixel to
pixel.The lowest quality machine vision system
uses a simple two-state sensor that registers
each pixel as being either black or white.
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Image Analysis Techniques gt Windowing
Concentrating vision system analysis on a small
field of view to conserve computer resources
of run time storage. gt Thresholding
Reducing an image to binary black or white
pixels. gt Histogramming A frequency
histogram is constructed for the pixel
counts at each level of gray accommodated
by the system.
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Edge Detection gt Binary Logic Search Guide a
search through an image, one pixel at a
time, as the search finds an edge, it will
follow it completely around the object. gt
Local Edge Elements Roberts Cross-Operator Templ
ate Filters
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Roberts Cross-OperatorComputes the square root
of the sum of the squares of the adjacent
diagonal differences between pixel gray-scale
values.
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FilterSmall template for finding a Vertical
edge. -1 0 1 -1 0 1 -1 0 1Find the sum of
products of each point in the image matrix with
all points in the filter matrix.