Glossary
IMAQ Vision for LabWindows/CVI User Manual
G-16
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pyramidal matching
A technique used to increase the speed of a pattern matching algorithm by
matching subsampled versions of the image and the reference pattern.
Q
quantitative analysis
Obtaining various measurements of objects in an image.
R
real time
A property of an event or system in which data is processed as it is acquired
instead of being accumulated and processed at a later time.
relative accuracy
A measure in LSB of the accuracy of an ADC; it includes all nonlinearity
and quantization errors but does not include offset and gain errors of the
circuitry feeding the ADC.
remove border objects
function
Removes blobs in a binary image that touch the image border.
resolution
The number of rows and columns of pixels. An image composed of m rows
and n columns has a resolution of
m
×
n
.
reverse function
Inverts the pixel values in an image.
RGB
Color encoding scheme using red, green, and blue (RGB) color information
where each pixel in the color image is encoded using 32 bits: 8 bits for red,
8 bits for green, 8 bits for blue, and 8 bits for the alpha value (unused).
Roberts filter
Extracts the contours (edge detection) in gray level, favoring diagonal
edges.
ROI
Region of interest. (1) An area of the image that is graphically selected
from a window displaying the image. This area can be used to focus further
processing. (2) A hardware-programmable rectangular portion of the
acquisition window.
ROI tools
Collection of tools that enable you to select a region of interest from an
image. These tools let you select points, lines, annuli, polygons, rectangles,
rotated rectangles, ovals, and freehand open and closed contours.
rotational shift
The amount by which one image is rotated with respect to a reference
image. This rotation is computed with respect to the center of the image.
