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CI Vision’s Pro Series of inspection systems for contract packagers feature Anti Vision Circumvention Technology and have been adopted by a personal-care-product company to inspect labels.

When a product batch is ready for inspection, an operator sets up the inspection type on a touchscreen interface – the same interface used on all CI Vision products.

The base model features two GigE Vision cameras in steel housings that are installed on either side of the conveyor where the products pass and up to four cameras can be installed, depending on the customer’s requirements.

The vision system is controlled by a custom-built PC, but some units are shipped with the Matrox 4Sight X industrial PC.

The CIVCore software that controls the image-acquisition and inspection tasks is built from the Matrox Imaging Library (MIL).

When an image is acquired, normalised grayscale correlation is used to determine the presence or absence of the label itself, as well as the location of the label’s region of interest that contains a bar or matrix code, or a lot number.

Code 128 one-dimensional and Data Matrix two-dimensional codes are read by MIL’s code module for readability and checked for correctness.

The CIVCore’s OCV module can read texts of lot numbers, product codes and Label Control Numbers, and is built from MIL’s pattern-matching and image-processing modules.

The Pro Series features an optional tool that detects if the same label appears on the front and back of the product.

The system uses the search model from the presence/absence feature to determine which label is in front of the camera 1.

With that result, the system automatically instructs the second camera to look for the other label.

If the second camera fails to find it, the system concludes that the product has the same label on both sides.

If the product fails any inspection, it gets flagged and diverted off the line.

Rick Koval, lead software engineer at CI Vision, implemented a three-part strategy to ensure that the system inspected 100 per cent of the products.

Koval’s strategy was to make sure that the vision system operated with other automation equipment at all times.

In other words, when the labeller is running the vision system must also be running as well.

During operation, the vision system uses image-acquisition trigger inputs as a mechanism for determining the product’s presence so that it can be inspected.

If a certain number of seconds pass without a trigger while the labeller’s run signal is detected, the vision system faults and outputs a signal to shut down the line.

Similarly, when the labeller is off and the vision system receives triggers, the labeller outputs a signal to shut the line down.

A fault signal also switches on a red tower light.

Attempts to bypass the vision system are blocked as the software checks for movement between the acquired images by comparing translation results.

MIL’s pattern-matching algorithms give the location results of the label’s features.

Then the locations are compared from image to image over the sequence of acquired images.

If a certain number of images indicate no movement between them, the current part and all future parts will fail.

The user controls the number of images to compare and the tolerance for movement, and the parts will continue to fail until the movement tolerance meets those parameters.

CI Vision’s Pro Series offers a compact footprint and easy installation inside the labeller machine or on an adjacent conveyor.

The system is also compliant with the FDA’s 21 CFR Part 11 regulations on product tracking.

Matrox Imaging, a leading developer of component-level solutions, is recognized for providing OEMs and integrators in the manufacturing, medical diagnostic and security industries with innovative yet cost-effective solutions.

Components include cameras, interface boards and processing platforms, all designed to provide optimum price-performance within a common software environment

Specifically designed to decrease development time and costs, Matrox Imaging technology is used by industry leaders in factory automation, process control, electronics and pharmaceutical packaging, semiconductor inspection, robotics, radiology, microscopy, and video surveillance. We ensure that customers stay with us over multiple product generations by consistently meeting their demands for cutting-edge technology, technical consulting services, integration assistance and the highest manufacturing standards.

A world player in imaging, Matrox has offices in the United Kingdom, Ireland and Germany, and sales representatives in more than 20 countries. Our proven track record assures customers that we will meet their needs for performance, value and service, now and in the future.

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