Pacific Communications Launces Pixim Based WDR Camera
January 12, 2007
From: Global CCTV Hub
NEW
from Pacific Communications, the PAC-587C Super Wide dynamic range
camera employs the Pixim digital pixel system wide dynamic range image
sensor and image process technology. DPS technology uses multi-sampling
to gather more information and improve picture quality and dynamic
range.
According to Pacific Communications, DPS technology not only records
the light levels but also calculates the changing rate of light level
in order to deliver a wider dynamic range for each pixel compared to a
CCD, even when there is a large contrast between lightness and darkness.
The processor translates light into a digital format at the immediate
point of capture minimizing signal degradation and allowing for greater
noise reduction methods and an optimal image reproduction.
Features of the camera include a horizontal resolution around 480
lines, auto exposure mode, auto white balance, backlight compensation,
auto gain control, activity/motion detection, digital zoom,
configurable alarms, electronic iris, on-screen display and plenty more.
Each PAC-587C colour camera uses the Pixim Dyna D2000 video imaging
system which is a highly integrated 2-chip set. The D2000 is designed
to deliver superior quality video giving up to 95dB dynamic range in
normal operation while giving high resolution sensitivity and colour
fidelity.
Pixim’s D2000 chipset is optimized for video surveillance/security
camera operation. Each chipset includes an entire video signal
processing chain, providing a programmable digital image sensor with an
integrated frame buffer memory and an advanced digital image processor
optimized for the sensor that includes automatic exposure, white
balance, color correction, and video generation.
The D2000 chipset provides unmatched image quality of Pixim’s Digital
Pixel System technology. Differences between the chipsets are in the
features provided in the image processor and software. Features in the
D2000 include digital video output for network/IP cameras, serial port
for remote control, day/night mode to improve performance in low-light
situations, digital pan/tilt/zoom, activity detection alarms, advanced
synchronization functionality (Genlock) and progressive output mode.
What is DPS?
Pixim’s patented Digital Pixel System technology marks a fundamental
breakthrough in imaging technology. Building on technology developed at
Standford University in the 1990s, Pixim has created an image capture
and processing system that gives high quality pictures with enhanced
dynamic range. This improved dynamic range raises both image quality in
scenes that include both light and dark areas.
The core invention of DPS is the inclusion of an analog-to-digital
converter (ADC) within each pixel of the image sensor. This ADC
translates the light signal into a digital value at the immediate point
of capture, minimizing signal degradation and cross talking the array –
this allows for improvements in noise reduction. Once the data is
captured in a digital format, a variety of digital signal processing
techniques are used for optimal image reproduction.
