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Optimized optical filter solution for ANPR ensures enhanced precision and fast recognition
For MACQ in Belgium innovation is the key element in every solution. Expert knowledge and knowhow permeates all aspects of their designs, solutions and products, why the company is number one in Belgium within the core business of traffic management.
The company manufactures its own ANPR (automatic number plate recognition) camera systems and software platforms which are developed for use in traffic management. This area encompasses traffic control, red light control and speed enforcement, just to mention some. As MACQ is both product and project oriented, the customer needs dictate the development.
In ANPR-solutions, it is important that the camera system delivers optimal recognition performance, including the best signal to noise ratio, in order to create the best results. The software inside is the key element in obtaining fast recognition, but without an optimized optical filter solution in front of the camera, the full potential of the system cannot be reached, and the ANPR solution can end up with average performance or worse.
To overcome this, MACQ utilizes an optical filter solution from PSC A/S. The solution consists of two optical filter materials with different properties combined. The main filter is optimized for the near infrared range which means that it efficiently blocks all visible light, allowing only near infrared light to be transmitted. The LED illumination is hidden behind this infrared filter, and through the properties of the infrared filter, illumination is enhanced. This in return improves the camera function.
The other filter part covering the camera, which is sensitive to both visible and near infrared light, is made from a high transmission, scratch-resistant material optimized for both the visible area and the NIR range, providing the best possible working conditions for the camera sensors. In this filter solution, surface treatment consisting of a clear hardcoat has been applied, ensuring lifetime durability even when exposed to rough environment.
PSC A/S’ unique ability to create highly complex and optimized parts from sheet materials, here integrating the required “dual functionality” into one single part, provides MACQ with a solution fulfilling their need for design freedom and high performance, which in the end brings the system performance into a league of its own.