| LED | Light Emitting Diode: a special type of semiconductor diode that emits incoherent narrow-spectrum light |
| Lens | A
multi-element optical system (for purposes of the MV market study,
single element lenses are not considered lenses but rather
sub-components.) |
| Lenses for 3-Chip, Beamsplitting Prisms
| All fixed focal length lenses used with 3-chip CCD or CMOS color cameras (regardless of their other possible characteristics) |
Lens Mount
| The lens mount describes how the lens physically connects to a camera
and the flange distance. The flange distance is the distance from the
back flange of the lens to the sensor in the camera.
1) Any camera may use a lens equal or greater than the format of the
sensor. For example, a 1/2" format camera may use a 2/3" format
lens.
2) F-mount lenses are compatible with
C-mount cameras. An F-To-C mount converter is required to use F-
mount lenses with C-mount cameras.
3) F-mount lenses
are compatible with CS-mount cameras. A 5mm extension tube (C-To-CS
mount converter) and F-To-C mount converter are required to
use F-mount lenses with C-mount cameras. 4) A C-Mount lens will work with a
CS mount camera by adding a 5mm spacer, but a CS mount lens will
NOT work with a C mount camera.
Mount
Specifications:
C
1" x 32 TPI thread and 17.5mm flange
CS 1" x 32 TPI
thread and 12.5mm flange
F 44mm 3 tab Bayonet and
46.5mm flange |
| Lighting
| Products used
to illuminate objects to be acquired and processed. Radiation produced
by these products is either visible, (400 to 700nm) or invisible, of
which there are two major types: ultraviolet (below 400nm) and infrared
(above 700nm). |
Line Light
| Lighting configured as a line, providing narrow, intense illumination |
Line Scan Camera
| Cameras that use sensors that consist of a single row of photodectors. Also called a linear array camera. |
| Linux | Linux is an open source Unix-like
operating system. Because of its robustness and availability, Linux has
won popularity in the open source community and among commercial
application developers. |
Little Endian
| Byte order: little units first (compare: big endian) |
| Local Threshold: Background Correction | Performs a background correction to eliminate non-uniform lighting
effects and then performs thresholding using the interclass variance
thresholding algorithm. |
| Local Threshold: Niblack | Calculates a threshold value for each
pixel based on the statistics of surrounding pixels. This algorithm
compensates for high lighting variations. |
| Loockup Table Exponential | Exponential Applies an exponential transformation on the image pixels,
which decreases brightness and increases contrast in bright regions. |
| Lookup Table Equalize | Increases the intensity dynamic by
distributing a given grayscale interval [min, max] over the full
grayscale [0,255]. This function redistributes pixel intensities in
order to provide a linear cumulated histogram. |
| Lookup Table Gray Scale Value | Improves contrast and brightness by applying a lookup table to an image. A
lookup table (LUT) contains values used to transform the grayscale
values of an image. For each grayscale value in the image, the
corresponding new value is obtained from the LUT |
Lookup Table Logarithmic
| Logarithmic Applies logarithmic transformation on the image pixels, which increases brightness and contrast in dark regions. |
Lookup Table Reverse
| Reverse, Reverses the pixel values, producing a photometric negative of the original image. |
| LUT | See Lookup Table |
| Lux | The lux (symbol: lx) is the SI unit of illuminance. It is used in
photometry as a measure of the intensity of light, with wavelengths
weighted according to the luminosity function, a standardized model of
human brightness perception. In English, lux is used in both singular
and plural. |
| LVDS
| Low Voltage Differential Signaling: a type of camera interface based on the RS-644 standard, which replaced RS-422 |
