The OCR technology used by DIS have been commercialized in dozens of terminals around the world and is adopted by governmental programs and port authorities. All systems employ area-scan cameras, solid-state illumination and powerful OCR engines. These systems have consistently demonstrated high reliability and overall high OCR accuracy. They are typically applied in marine terminals for process automation involving inspection tasks.
The performance of an OCR engine is critically dependent on the image-capturing sub-system. The image-capturing units must include an optical and illumination solution to produce images of the container ID number with sufficient quality (focus, resolution, contrast, and uniformity), under all operating and ambient conditions (sunlight, sun glare, night time, adverse weather conditions and dirt-covered numbers).
DIS provides OCR solutions for both landside operations as well as waterside operations. This includes OCR solutions for STS Cranes, RMG Cranes, Gate portals and Rail tracks.
OCR solutions by DIS go beyond standard character recognition and also support for object recognition. Examples are for example IMO class recognition and Door Direction detection. And still, new recognition items arrive. DIS guarantees the performance of the system as follows:
The % performance indicates the accuracy of the system, measured as a percentage of completely correct results devided by the total amount of containers tested, independent from the amount of views used. It does not exclude any selected events, but does exclude "flat" containers and assumes at least a traffic of >1000 containers. The figures are minimum guaranteed figures and for many items, in practice the performance is more in line of 97–98%. Especially when receiving information like bay plans and truck appointments upfront.
The Crane OCR system detects a twist lock change from the crane controller. When the twist locks are reported to change from open to closed, the OCR system will start monitoring the hoist and trolley position. When these indicate that the container is within the outer trigger zone, the camera system is initiated. When the container moves on into the inner trigger zone, the image analyzer is activated and images are stored. As soon as the container leaves the inner zone, the system will analyze the image data with the hoist position log, to find the correct images of the container. When the pictures have been selected, the OCR function is activated and the data is extracted from the images.
Crane- / customer specific is the positions of the cameras. Depending on the type of operations (platform, between the legs, back reach, single lift, tandem lifting), the crane brand and the required output, a design will be made. Any final configuration fully depends on the 3 factors mentioned above, but any crane is supported by our Crane OCR system.
The system scans the ID numbers while the truck is in motion, based on a set of sensors. It automatically operates the illumination, takes pictures from a number of cameras, extracts the ID numbers, classifies the type of containers, verifies the results, then displays and outputs the results in our Global Control System.
Our OCR portal is one of the most environment friendliest amongst others in the market. A single lane will only consume 700W and only when a truck is traveling through. Next to that, the OCR portal can stand just out on the open and does not require any canopy or what so ever.
For extreme weather conditions or installations that require to be vandalism proof (installations outside the facility its perimeters), we have developed the unique Concept Gantry.
Our Rail OCR is a sophisticated image processing system that tracks and reads multiple items from containers that are carried by trains. The Rail OCR solution is comparible to the Gate OCR portal, though the train puts extra requirements to the OCR system as due to the driving through speed and amount of images to be processed.
Each system can control a single rail track, with trains moving at both direction, and can detect single or double container - or no container at all. The system is configured for a single-track installation, with equipment installed on both sides of the track. It’s main purpose is to report all traffic of containers on rails into or out of the terminal. Rail OCR portals are adopted less than Gate OCR portals because of the fact that the main benefits only apply for incoming inspection (any outbound information is only for double check as one cannot stop the train). In addition, Rail OCR portals support managing track split-ups.