Using filters in color inspection

July 16, 2007
The proper use of optical filters solves many color imaging problems, sometimes without a color camera.

The proper use of optical filters solves many color imaging problems, sometimes without a color camera.

When an inspection application requires recognition and separation of color, a decision must be made to use a system that uses either a color or monochrome camera. Many times this decision is made without truly understanding what tools are available and which system may work best. System integrators and designers will often instinctively choose a color camera because, based on personal experience and human vision, this is what seems to make the most sense.While such a system may work, basing the decision on appearance rather than looking more closely at actual performance can be a less-than-optimal solution and a disservice to the customer.

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