Sanyo VCC-WD8875P - Manual (Page 5)

CMOS Sensor of Super Dynamic Range
Conventional CCD drawbacks included electrons that
overloaded when receiving too many electrons and allowed
signals to leak. This in turn reduced the device’s dynamic
range. The newly developed CMOS sensor is engineered to
handle leaked electrons and can transmit virtually complete
receiving image information to image signals, effectively
reproducing images having a wider dynamic range for clearer
images that reveal more. The new CMOS sensor features an
extremely wide dynamic range that far surpasses
conventional cameras.
“Retina-Morphic Processing Algorithm”
The newly developed “SANYO Advanced Image Processing
Engine” utilizes a “retina-morphic processing algorithm” for
effective real-time dynamic range correction. Processing is
with an algorithm developed after extensive research into the
human optic system including eyes, the optic nerve and brain.
Utilizing a model of the human retina’s dynamic range
adjustment ability, this algorithm provides revolutionary
corrective effects that set a new reference standard. Every pixel
has its luminance dynamically changed in reference to areas
inside the frame. Images can therefore be realistically repro-
duced even when luminance varies dramatically. Color
reproduction under backlit conditions is optimized.
Progressive Scan System
In a conventional CCD, an image is produced by using
high-intensity and low-intensity signals to obtain dynamic
range, and this generates time lag. A progressive scan system
eliminates image composition processing, preventing time
lag from being generated and delivering a high-quality clear
image without misaligned contours from the composition
process even if capturing a quick-moving subject.
Conventional Camera SANYO Advanced WDR Camera Conventional Camera SANYO Advanced WDR Camera
New CMOS Sensor Delivers
the Widest Dynamic Range Yet
SANYO Advanced
Image Processing Engine
Incident light
Electrons
Photodiode
Photodiode
Leaked
electrons
Capacitor Leaked electrons
Electrons
Incident light
Conventional CCD
Structure of
WDR CMOS Sensor
Leaked electrons that leak out
from the photodiode are left
as is, reducing the dynamic
range. The built-in capacitor collects
the electrons that leak out,
boosting the signal per unit
area to generate an image
with a wider dynamic range.
New Structure of CMOS Sensor
550 TV Lines of Horizontal Resolution
Ensure High-Definition Images
The camera is equipped with a new 1/3-inch CMOS sensor and
newly developed SANYO Advanced Image Processing Engine
to provide maximum information density. The result is a
480,000 pixels resolution with images having the industry’s
top-ranking level 550 TV lines of horizontal resolution.
Super Dynamic Range of 65dB
SANYO’s Advanced WDR camera has achieved super dynamic
range of 65dB in the industry top class by combining with the
new WDR CMOS sensor and SANYO’s Advanced Image
Processing Engine. (Advanced WDR Image Processing System)
Pixel-by-Pixel
Optimum Processing
New CMOS
Sensor
High Gain
Signal
Low Gain
Signal
A/D Convertor
Real-Time Dynamic
Range Correction RGB Interpolation
Processing High Resolution
Processing
SANYO Advanced Image Processing Engine
Advanced WDR Image Processing System
The newly-developed “SANYO Advanced Image Processing
Engine” uses a unique algorithm to individually process each
pixel so that the image data possesses the widest possible
dynamic range to approximate the human retina as much as
possible. The end result produces images with rich and
smooth gradations that were not possible previously.
550 TV lines
480 TV lines
Conventional
high-resolution camera