Hitachi lens marks evolution of digital surveillance systems


VK-S655Advanced digital signal processing (DSP) technology ensures outstanding colour reproduction and low light performance, capable of capturing details such as facial features, clothing, and automobile colours that can serve as vital evidence. Setting a new standard for imaging quality, night or day, the Hitachi VK-S655N/EN marks another phase in the evolution of digital surveillance systems.

A newly designed 36x auto/manual focus optical zoom lens delivers enhanced resolution, clearly capturing subject details at long distance. Proprietary Hitachi auto-focus control makes it possible to track rapidly moving subjects, while the addition of a 12x digital zoom delivers a maximum zoom factor of 432x. The improved lens design produces crisp clear details, even in peripheral areas of the image.

Advanced digital signal processing ensures outstanding colour reproduction and combined with the latest CCD technology provided quality pictures in challenging viewing conditions. Special frame noise reduction techniques minimize random noise and after-images often associated with moving subjects. Conventional surveillance camera systems using interlaced scanning are not capable of producing clearly identifiable images of moving cars or people.

The interlace method uses two scans to create a single image frame, producing jittery, poorly defined images when still images are pulled from the video feed. Progressive scanning incorporated in the Hitachi VK-S654N/EN records the frame in a single sequential scan, creating sharp, high resolution still images, with clearly defined lines and contours.

The VK-S655 incorporates the latest in image stabilization technology compensating for vibration or movement of the camera, automatically minimizing image blur. It is possible to mask the camera’s view of areas subject to privacy concerns, such as windows and entrances. The position and size of the mask is maintained, even when the camera pans, tilts or zooms, making this unit particularly suitable for surveillance of public areas.

The motion detection feature triggers an alarm when motion is detected in designated areas of the surveillance frame. Motion detection can be activated in as many as eight frame blocks out of a total of 64. To further enhance the picture quality frame noise reduction is built in combined with wide dynamic range enabling you see into dark areas of brightly lit areas. The digital output provides lossless, noise-free data maximising the camera performance. The operational temperature has been extended to –10 ~ +60 degrees allowing it to be utilised in colder areas.

The RoHS-compliant VKS654N/EN meets guidelines for permissible levels of lead, mercury, cadmium, hexavalent chrome, PPBs and PBDE, making it an ecofriendly way to implement high-tech surveillance.

The Hitachi VKS654 offers superb features for the security market with straightforward effective interfaces to meet current market demands whilst providing a green solution.




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