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Machine Vision Systems Terms
–
A technology that provides 3D images from a large quantity of 2D cross-sectional
images. These images are assembled in a computer from pictures or scans
taken of a desired piece.
– The manner in
which outside information is brought into an analysis system.
– The diameter of the
lens, which controls the amount of light that reaches the photoconductive
image sensor.
– Reduction of signal
strength.
– Quality of color, which
includes both hue and saturation.
– The restoration
of original information from compressed data.
– The range of
the distance from the sensor to the object at which the lens is focused.
– Conversion
of a video picture into pixels by means of an A/D converter, where the
level of each pixel can be stored in a computer.
– A filter used
to transmit light based on wavelength rather than on the plane of vibration.
Dichroic filters will transmit one color while reflecting a second, when
illuminated with white light.
– Light source
or optical image delivery via long, flexible fibers of transparent material,
usually bundled together. Light is transmitted via internal reflection
inside each fiber; coherent fiber optics are spatially organized so images
can be relayed.
– The plane perpendicular
to the lens axis at the point of focus, usually found at the image sensor.
– The amount of frames
that are displayed per unit of time.
– The non-contact dimensional
examination of an object.
– Variations of values
from white through shades of gray to black in a digitized image with black
assigned the value of zero and white the value of one.
– An incandescent
lamp inside which is a gas similar to iodine that is constantly evaporated
and then redeposited on the filament.
– The process
of identifying objects and shapes in a photograph, drawing, video or other
visual image. Image analysis is used for everything from colorizing classic
motion pictures to piloting cruise missiles.
– The plane surface
of the imaging sensor, perpendicular to the viewing direction, at which
the optics are focused.
– The region of the
electromagnetic spectrum adjacent to the visible spectrum, just beyond
red with longer wavelengths.
– Classification
of images into predetermined categories, usually using statistical methods.
– Acronym for picture
element. Pixels are the individual elements in a digitized image
array.
– The process
of manufacturing at both the design and production stage. Process imaging
is a generic term for quality control imaging.
– An image processing
operation that enhances edges. A non-sharp mask adds a low-pass, filtered
image to the original, resulting in edge enhancement.
– An electrical or mechanical
device used to control the amount of time the imaging surface is exposed
to light. The shutter is often used to stop the blur created by moving
objects.
– Enhancing
an image by changing its spatial frequencies.
– A compound lens
that remains in focus as the image size is continuously varied. A zoom
lens may be motorized or manually operated.
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