National Instruments IMAQTM User Manual page 110

optical representation
outer gradient
P
palette
particle
particle analysis
pattern matching
picture element
pixel
pixel aspect ratio
pixel calibration
pixel depth
PNG
Prewitt filter
© National Instruments Corporation
Contains the low-frequency information at the center and the high-
frequency information at the corners of an FFT-transformed image.
Finds the outer boundary of objects.
The gradation of colors used to display an image on screen, usually defined
by a CLUT.
A connected region or grouping of non-zero pixels in a binary image.
A series of processing operations and analysis functions that produce some
information about the particles in an image.
The technique used to locate quickly a grayscale template within a
grayscale image
An element of a digital image. Also called pixel.
Picture element. The smallest division that makes up the video scan line.
For display on a computer monitor, a pixel's optimum dimension is square
(aspect ratio of 1:1, or the width equal to the height).
The ratio between the physical horizontal size and the vertical size of the
region covered by the pixel. An acquired pixel should optimally be square,
thus the optimal value is 1.0, but typically it falls between 0.95 and 1.05,
depending on camera quality.
Directly calibrates the physical dimensions of a pixel in an image.
The number of bits used to represent the gray level of a pixel.
Portable Network Graphic. An image file format for storing 8-bit, 16-bit,
and color images with lossless compression. PNG images have the file
extension PNG.
An edge detection algorithm that extracts the contours in gray-level values
using a 3 × 3 filter kernel.
G-13 IMAQ Vision for Visual Basic User Manual
Glossary