IDEC DATAVS1 Series - Manual (Page 83)

Instruction Manual SVS1 Series
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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.