Product category:
Monitoring and sensor equipment and systems
News Release from: Laser Components (UK) | Subject: LT-FS Series colour recognition system
Edited by the Manufacturingtalk Editorial
Team on 18 July 2003
Colour recognition system ofers high
performance
Designed as an industrial system with rugged and robust construction, whilst maintaining high performance, a colour recognition system compares every object with a pre-calibrated colour.
The LT-FS Series colour recognition system is designed as an industrial system evident by its rugged and robust design and construction whilst maintaining high performance Colour perception is different to every person and is particularly variable due to age, quality of eyesight, tiredness, ambient illumination, viewing angle and many more factors
This article was originally published on Manufacturingtalk on 1 May 2003 at 8.00am (UK)
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It is also difficult to look at sequential objects and observe subtle colour changes between them, even more so if the difference between advancement objects is small but perhaps large between the first and last, the human eye almost never notices a gradual change during the series.
None of this happens with the LT-FS colour recognition system.
Every object is compared with a pre-calibrated colour, stored as part of a single step "learning" process.
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The device will indicate if a pre-determined tolerance range is exceeded, and the colour level and tolerance can be adjusted as many times as required.
The measuring probe is simply directed on the object(s) and a button is pressed to "teach" the unit each colour.
Now the device will compares every object with the learnt colour(s).
During the "teach in" procedure up to 32 different colours can be entered and stored.
This is possible manually or automatically in combination with a programmable control system or a computer.
In addition a tolerance limit can be assigned to every single colour or to the complete range.
Furthermore, every "learnt" colour can be called up externally and compared with the object under test.
The device reports the number of the measured colour to the computer for display on a monitor.
Objects on conveyors can be synchronised permitting high-speed colour recognition and multiple measurements per object to produce average values for additional accuracy in high precision applications.
How does it work? - The measurement principle is similar to the function of the human eye.
The components of the three elementary colours red, green, blue of the object under test are measured and processed into comparison values.
With these three elementary colours every colour can be defined.
The device is able to distinguish between more than 2 million different colour values.
This is achieved using electronically regulated white LED illumination of the object under test and a colour sensor that recognises the three elementary colours.
A microprocessor then calculates the colour values from the current values of the three sensors and stores them in a memory.
With every additional measurement this value is compared with the previous value which is then accepted or rejected as being identical, within tolerance, or deviating, out of tolerance to the preset colour.
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