For decades, CCTV monitoring system project traders have been faced with a seemingly insurmountable obstacle, how to make the camera has a bright sunlight or bright background on the view taken by the details of the dark area.

This happens sites include: installed the wide glass office building lobby, driving in an ATM the camera, with a large truck import and export terminals, and nearly every retail stores. Cameras were installed in these places, because of the light, there will be can only see the outline of the image, the picture are destroyed, such problems as lack of color levels.

General solution mixed effect: sacrifice camera original advantages, to get the useful image or technology, such as backlight compensation function.

GE Security Xposure technology represents the camera sensor is a breakthrough progress. It is a kind of capture high quality images of cutting-edge technology, even in the most dynamic and the most demanding lighting condition is no exception.

The working principle of

Xposurer technology is the core of every pixel in the image sensor in contains a digital converter (ADC). ADC when capture the light signal is converted to a digital signal directly, thus minimize signal attenuation and interference in the arrangement. At the same time, it also supports a higher level of noise reduction method. Once the capture data in digital format, all kinds of digital signal processing technology was used to obtain the best quality images.

The technology USES a technique known as the multiple sampling to collect information, in order to achieve unparalleled image quality and wide dynamic range. Each pixel in a capture images after many no destructive sampling alone (generally in the video image to 50/60 times/SEC). Imaging system determine the best time for sampling and before pixel saturated, unable to keep more charge storage pixel information.

Then, the system to capture the information stored in each pixel value (intensity, time and noise offsets) for parallel processing, and converted into high quality image. In contrast, other technologies in general is to set a picture exposure time, and in the time of each pixel sampling, which will lead to some underexposed (too dark) and overexposed pixels in the image (too light).

Xposure technology is the first product of UltraView KTC - XP1, which consists of a digital image sensor and a digital image processor, its function similar to the eye and brain, with two-way real-time interactive, can achieve the highest quality to capture images. Like a man walks into a dark room, the brain can indicate an eye pupil dilation, to accept more light, digital image processor new code will be loaded on the sensors, not only can change the time of exposure, but also can change the actual image capture algorithm. The result is: under the specific image characteristics and light conditions, as far as possible to get the best image.

Because each pixel has its own AD converter, and the generated information is capture and processing independently, so that each pixel is actually a camera. Each pixel of exposure time after adjustment, to adapt to the pixels in the image sensor array location unique light conditions. Then, these images are combined to generate high quality video images or pictures.

Higher resolution and better colorful

Popular terminology is the number of pixels. It is believed that pixel number, the more clarity. This, of course, that's right, but for surveillance cameras, is completely wrong, because the more pixels means that need more number of transmission bandwidth and storage space. For example, if a 400000 - pixel image (with the safety of the high resolution camera is belong to the standard), 20 g storage space are needed to 60 frames per second the frame rate of 12 hours of video image, is a picture of a 4 m size image will need 200 g of storage space for the same 12 hours. For a video camera, although higher image quality, but at the expense of the storage space, this is the most number of pixel camera up to about 400000.

Xposure technology by transform the shape of the pixels on the sensor and image processing methods, to overcome the need more pixels to the disadvantage of high resolution. Different from the traditional CCD sensor, pixel shape Xposure technology can ensure as little as possible to correct sensor resolution diagonal, provides a higher visual clarity.

Xposure based on CMOS technology, and the integration of an innovation patent processing method. Compared with the traditional CCD camera, the CMOS sensor in every square inch of the area has a higher number of pixels, which can obtain higher resolution. More importantly, Xposure CMOS sensor adopted a 14 - bit processor, and the difference of the brightest pixel and the dark pixels range for 65556. The CCD camera is much larger than most, because the latter using 8-bit processor, the brightest only 256 times brighter than the dark pixels. Therefore, after using Xposure technology, users can get the wide dynamic range of more than 95 dB, and wide dynamic range of CCD sensor is only 40 dB.

Using traditional sensor images and USES images from Xposure technology, compared the difference is very obvious, if digital zoom in the image, the difference will be bigger. In fact, some customers said Xposure digital zoom can be equivalent to that of some optical zoom on the camera.

For each pixel precision, the best exposure time, same can guarantee colour is as real as possible. One aspect of this is just the Xposure technical practicability. When compared with WDR technology or even other CCD camera, UltraViewr provide color and color is much more close to reality, the contrast and brightness control is much more accurate. Even under the condition of not very demanding, which is also applicable to many outdoor Xposure technology in wide has advantages in the application of dynamic demand.

The system software

Different from the processing of hardware connection sensor technology, Xposure technology adoption is based on the software processing. This means that no replacement hardware to upgrade technology, and after one-time buy a camera, can be several times on the camera image processing ways of improvement. This extend the service life of the camera Xposure technology, and as part of the end user service contract, even for the installer to create a potential repeat revenue model.

With the transformation of imaging technology to the digital system, Xposure technology for video surveillance solutions of the highest quality laid a solid foundation of image capture and processing.