Dallmeier solutions for HD video, Panomera® camera and video content analysis for rail traffic
Modern video surveillance in the rail traffic infrastructure requires flexible solutions which fulfil stringent quality and security demands: Cameras distributed over vast areas, recording and transmission of video signals via live presentation, use of digital cable and wireless networks, intelligent picture processing, integration of audio channels and control as a video system via a higher-order control or management system.
With the development of modern facilities for using video technology on the rail system, with its many stations (aboveground and underground), workshops, shunting yards, rolling stock, etc., the need has also grown for a high degree of flexibility and inte-gration. The extensive variety of application areas can be grouped in the following three requirements classes:
1) Video technology for protecting people
The safer the individual traveller feels, the more attractive the public transport system becomes as a mode of transport. The incidents that occur all over the world, sometimes with fatal consequences, cannot be tolerated. Besides identifying the perpetrators, video analysis is a major new approach in the automatic identification of critical situations. At the same time, video technology also protects personnel in particularly hazardous locations such as when working on the tracks in shunting yards.
2) Video technology for protecting property
Vandalism, theft, graffiti and property damage account for enormous costs in almost all facilities associated with rail traffic. With high-quality video recordings, it is often possible to identify those responsible. In many cases, the mere realisation that they may be identified is enough to make potential offenders think twice, and they cease their activities altogether. The portfolio is completed with solutions that provide reliable surveillance of all buildings, stations, local railway stations, workshops and depots as well as train and carriage interiors.
3) Video technology in support of efficient operations
In short, it is necessary to ensure constant surveillance of all important facilities, and to detect anomalies automatically and as early as possible so that the necessary steps can be taken in time. Besides the classic video surveillance arrangements in control centres, in future increasing use will be made of automated procedures for evaluating a situation detected in an image and initiating appropriate responses. This will enable rapid detection of dangerous situations in all critical areas (e.g., in the area around escalators, ticket vending machines and so on).
In the future, improved video systems will be used in local transport systems to enable the operator to determine quickly that the automatic door closing function has been completed safely, and begin the onward journey promptly. Large crowds will be detected and can be dealt with very efficiently through appropriate instructions or the rapid deployment of security staff. Disruptions to operations can be minimised by early detection of objects or individuals on the track.In depots, workshops and shunting yards, comprehensive solutions for access control of personnel and vehicles can be im plemented, including code identification, to optimise operating procedures.
Imaging and Panomera®
The security requirements everywhere in the railway environment are strict. Whether on station premises, in depots, along the lines or inside trains: large areas of land and buildings with enormously diverse requirements must be protected by constant surveillance. In particular, expansive areas such as shunting yards are especially challenging for video surveillance. In the past, in order to adequately monitor the entire area, it was necessary to use a number of cameras installed in a whole range of locations. Dallmeier’s multifocal sensor system Panomera®, however, represents an entirely new technology and a fundamentally different approach to the issue of video security.
Panomera® is a unique HD camera technology, which was especially developed for the video surveillance of expansive areas. Panomera® guarantees highest detail resolution at every distance.
Conventional megapixel cameras have a definite disadvantage: The farther you zoom into the picture, the higher the loss of detail, causing the picture to become blurry. Panomera®, however, stands out due to its completely new lens and sensor concept: The resolution never falls below the specified parameters, not even in the most distant areas of the image. Therefore the Panomera® effect guarantees a uniform resolution over the entire scene. This way, even objects that are farther away can be displayed with the same resolution quality as objects in the foreground of the picture.
In conjunction with the other IP cameras manufactured by Dallmeier, all of the requirements with which a modern camera system must comply are satisfied in full. Dallmeier cameras produce clear, high-contrast images in every situation, even in the often difficult lighting conditions encountered during surveillance of a railway facility .Due to their exceptionally wide dynamic range, the cameras are ideally suited for use, e.g., in railway buildings in which large expanses of glass and outdoor areas create wide variations in lighting during the course of a day, occasionally including direct sunlight. On outdoor mountings, these cameras produce image material that is entirely usable even with bright backlighting for ensuring safe surveillance of the platforms. People and vehicles can be detected reliably even in rain, hail or snow due to the outstanding quality of the image material. Whenever the system detects an event, the event can be recorded and reported to the security control centre according to the pertinent rules.
In conjunction with Dallmeier image transmission and recording technology, the operator is in control of a complete video security system with the best components, fine-tuned to one another, from one source.
Image processing – image transmission – image storage
The Dallmeier product range offers the most modern solutions for the requirements of today’s railway operators. By using the virtual matrix and the numerous intelligent video analysis systems (from people counting to vandalism detection the station premises), solutions ensuring maximum security are created.
The virtual matrix from Dallmeier enables the transmission and recording of video and audio signals in broadcast quality via an Ethernet/IP network. Using this technology any number of cameras in the railway environment can be analysed, recorded and, if necessary, transmitted via the IP network.
The implemented video compression enables camera images to be transmitted in real-time and with the best possible quality and frame rate, even allowing convenient control of PTZ cameras. Recording also occurs in broadcast quality into a ring memory, which is automatically overwritten after a preset time has passed (e.g. 14 days). Defined video sequences can be archived so that they are admissible for use in legal proceedings.
Intelligent video content analysis systems are able to analyse video images and, for example, identify suspicious behaviour on the basis of a person moving in a given direction in a certain area, or standing in a critical area, and then alert the higher-level management system. The live image is then switched to one of the video surveillance monitors by the virtual matrix. The most modern algorithms, such as object classification, ensure that the false alarm rate from ambient environmental influences is minimised. The use of the superior SEDOR® self-learning technology improves the quality of event detection considerably and reduces the configuration effort.
All Dallmeier devices can be integrated into the system network and enable simultaneous recording and playback of any connected camera via the time-shift method. PTZ functions can be used. Additional functions, such as slow-motion playback, scalability of image quality, numerous playback functions and integrated image filters for improvement of picture quality (e.g. with noisy camera signals) show the range of capabilities of the devices and predestine them for use in the railway environment.
Dallmeier provides a variety of management systems for control of all the devices, and also different interfaces for integration in an existing infrastructure such as a higher-level control point.
- Implementation of a state-of-the-art video surveillance solution
- Flexible and scalable expandability and adaptation to future requirements
- Use of the most modern technologies available for networking, cameras and video technology
- Use of the most advanced algorithms for picture processing and event analysis based upon them (video analysis systems)
- Integration in the existing infrastructure
- Implementation of specific procedures in support of security personnel
- Availability of videos on mobile devices carried by service and security staff