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Glossary
© National Instruments Corporation G-9 IMAQ Vision for Visual Basic User Manual
intensity calibration Assigns user-defined quantities such as optical densities or concentrations
to the gray-level values in an image.
intensity profile The gray-level distribution of the pixels along an ROI in an image.
intensity range Defines the range of gray-level values in an object of an image.
intensity threshold Characterizes an object based on the range of gray-level values in the
object. If the intensity range of the object falls within the user-specified
range, it is considered an object. Otherwise it is considered part of the
background.
J
jitter The maximum amount of time that the execution of an algorithm varies
from one execution to the next.
JPEG Joint Photographic Experts Group. An image file format for storing 8-bit
and color images with lossy compression. JPEG images have the file
extension JPG.
K
kernel A structure that represents a pixel and its relationship to its neighbors.
The relationship is specified by weighted coefficients of each neighbor.
L
labeling A morphology operation that identifies each object in a binary image and
assigns a unique pixel value to all the pixels in an object. This process is
useful for identifying the number of objects in the image and giving each
object a unique pixel intensity.
line gauge Measures the distance between selected edges with high-precision subpixel
accuracy along a line in an image. For example, this function can be used
to measure distances between points and edges. This function also can step
and repeat its measurements across the image.
line profile Represents the gray-level distribution along a line of pixels in an image.