National Instruments IMAQTM 用户手册
Glossary
© National Instruments Corporation
G-9
intensity calibration
Assigns user-defined quantities such as optical densities or concentrations
to the gray-level values in an image.
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.
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.
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.
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.
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.
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.
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.