Datalogic 959941000, Instruction Manual

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DataVS1 Series Instruction Manual
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15. GLOSSARY

Algorithm:
a combination of instructions that lead to the solution of a problem through a series of steps;

Area of inspection:
this corresponds to the area of interest acquired by the sensor, or part of the same,
which is then processed;

CMOS:
device that acquires the images. It consists of a set of photo-sensitive elements (  pixels)
arranged in a matrix that are exposed to light through a glass window on chip surface;

Focus distance:
distance between the rear nodal point of the lens (the point where the light beam
leaves the rear part of the lens) and the sensor;

FOV:
abbreviation of Field Of View. This the area framed by the sensor;

Grey scale:
scale of values associated to the brightness of the pixels in an image. For an 8 bit image,
there are 256 possible values (0 – 255, where '0' stands for black and '255' stands for white);

Inspection:
process where the sensor controls and measures the target image, providing an output
result;

Inspection result
: this can be:
- "OK", if the inspection was successful (all the controls/measurements gave a positive result)
- "Failure", if the inspection was not successful or if the inspection was not concluded due to it
not being possible to perform the control/measurement process;

LED:
abbreviation of Light Emitting Diode, a device that exploits the optical properties of certain
semiconductor materials to produce photons from the recombination of electron-gap sets;

Noise:
insignificant data that alter the sources of information to be processed;

Operating distance:
distance between the rear part of the lenses and the target object;

Reference image:
stored image that acts as the reference image during processing;

ROI:
abbreviation of "Region of Interest", and also "rectangle of interest", this is the area of the acquired
image that is controlled/measured;

Sample image:
see Reference image;

Status:
the result of the inspection referred to the individual control/measurement (which can indicate
"OK" or "Failure" values);

Target image:
the image acquired by the sensor, which is then processed/inspected;

Task:
literally "job" or "operation". Indicates each single action that, as part of a group of activities, leads
to the solution of a problem.