National Instruments IMAQTM - Manual (Page 113)

Glossary
IMAQ Vision for Visual Basic User Manual G-16 ni.com
spatial filters Alter the intensity of a pixel relative to variations in intensities of its
neighboring pixels. You can use these filters for edge detection, image
enhancement, noise reduction, smoothing, and so forth.
spatial resolution The number of pixels in an image, in terms of the number of rows and
columns in the image.
square function See exponential function .
square root function See logarithmic function .
standard representation Contains the low-frequency information at the corners and high-frequency
information at the center of an FFT-transformed image.
structuring element A binary mask used in most morphological operations. A structuring
element is used to determine which neighboring pixels contribute in the
operation.
subpixel analysis Finds the location of the edge coordinates in terms of fractions of a pixel.
T
template A color, shape, or pattern that you are trying to match in an image using the
color matching, shape matching, or pattern matching functions. A template
can be a region selected from an image or it can be an entire image.
threshold Separates objects from the background by assigning all pixels with
intensities within a specified range to the object and the rest of the pixels to
the background. In the resulting binary image, objects are represented with
a pixel intensity of 255 and the background is set to 0.
threshold interval Two parameters, the lower threshold gray-level value and the upper
threshold gray-level value.
TIFF Tagged Image File Format. An image format commonly used for encoding
8-bit, 16-bit, and color images. TIFF images have the file extension TIF.
time-bounded Describes algorithms that are designed to support a lower and upper bound
on execution time.
tools palette A collection of tools that enable you to select regions of interest, zoom in
and out, and change the image palette.