Banner PresencePLUS Pro COLOR—PROII Camera - Manual (Page 387)

R
recognition
A match between a description derived from an image and a
description obtained from a stored model or feature set.
region of interest (ROI)
The Region of Interest (ROI) is the area to be analyzed inside
user-defined boundaries.
repeatability
The degree to which repeated measurements of the same
quantity vary about their mean.
resolution
1. The smallest detectable change in position or size of an
object.
2. The closest distance between two objects (points) in an
image, identifiable as two separate objects rather than one
object.
S
shift register
An electronic circuit consisting of a series of storage locations
(registers). During each clock cycle, the information in each
location moves (shifts) into the adjacent location.
signal-to-noise ratio
The ratio of the maximum value of an output signal to the
standard deviation amplitude of the noise on the signal.
strobe light
A pulsed illumination source that generates short bursts of
high-intensity light.
sub-pixel resolution
Any technique resulting in a measurement with a resolution
(interpolated position of change) of less than one pixel.
T
template matching
Comparing a template with an object in an image. Usually
performed at the pixel level, as with a template correlation.
threshold
The intensity (specific pixel value) below which a stimulus
produces no effect or response. Often used to convert a gray
scale or analog image into a binary image.
thresholding
A scene segmentation process based on converting a gray scale
image into a binary image by reassigning pixel gray levels to
only two values. Regions of the binary image are separated,
based on whether pixel values in the gray scale image were
above or below a chosen intensity level.
throughput
The total capability of equipment to process or transmit data
during a specified time period.
tolerance
The established range upon which to base the differentiation
between good and bad products.
translation
Movement left or right, up or down, but not rotated; a
geometrical operation that shifts the position of an image from
its original position.
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