Briefly about… vision systems

What are vision systems and why are they used? How 2D, 3D, multispectral and hyperspectral systems help in quality control in factories?

Briefly about… vision systems

An irreplaceable sense

Among all the senses that man has, one is distinguished by its usability and versatility of use. It is a sight, and it has evolved through process of evolution, resulting in an organ that allows photons to be converted into a useful information. It’s very similar with the vision systems in industry. They are able to provide key information about the quality of the product, its location and even structure, based only on photons reflected from the object.

Versatile use

How it’s working?

In vision systems a camera that provides images about a checked or controlled object has a key role. The object (most often the product) is illuminated in a way that allows key aspects to be extracted by the camera. A specialist, who knows well the influence of such factors as depth of field, time of illumination or angle of illumination, can extract from the camera output data a whole range of product features.

 

What can we see with vision systems?

In a simple way, we can measure the dimensions of the objects, its angles and shape, uniformity of color, surface quality, presence or absence of some features, as well as inclusions and other defects. No measuring device in the industry is as versatile in measurements as a camera.

Efficiency greater than ever

Thanks to minaturization of efficient electronic components, vision systems are becoming more and more intelligent in even smaller forms. Smart cameras are becoming ubiquitous – thus in addition to taking pictures/movies they allow to automate the processing of obtained images without the presence of an additional computer. Thanks to this, such device – in one simple housing – be an independent measuring system that directly provides control information or measurement values that can be used in subsequent devices in the production chain.

Many varieties and tasks

There are many varieties of vision systems that can perform different roles.

 

  • 2D systems

These are the most commonly used systems based on a single camera that takes pictures, then process it in an industrial computer in in the smart camera itself. Thanks to the system simplicity, they still solve the most measurement and test problems in the industry.

 

  • 3D systems

Although they are most often based similarly to 2D systems on a regular camera, in combination with a specialized lighting system they allow to obtain information about the three-dimensional aspect of the observed object. Instead of images, they provide cloud of points that are processed in very efficient electronics, allowing one to measure even more features than a 2D system. Increasingly, they can be found in industry, and in some areas, completely replaced 2D systems.

 

  • Multispectral and hyperspectral systems

This is a most technically demanding variation of vision systems. They collect the same photons and in the same way as 2D systems, however, they allow a precise distinction of the wavelength of the measured light. Thanks to it, it becomes possible to notice very subtle differences in the color of the object, which entails additional information not available from the other types of vision systems.

Scanway is an expert in the field of vision measurement systems

One of the directions of our company’s activities is the continuous improvement of measurement systems and their integration in an increasing number of production plants. We want everyone to experience a highly efficient, trouble-free and based on the latest solutions measurement systems.

 

If you see an application of vision systems in your production plant or you’re considering implementing it – write to us! (contact form can be found at the top of this page).

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