widelux_osd.pdf

WideLux WDR Technology

Visionhitech WideLux WDR technology provides a number of significant imaging benefits as compared to a current alternative WDR solution available in the market. It achieves these benefits due to the unique built-in Timing Generator unit complemented by the special dedicated units for advanced signal processing. The purpose of this Technology Release is to describe shortly the advantages provided by a WDR camera in view of Super Low Light Sensitivity, Ultra Wide Dynamic Range Performance, High Resolution, 3D Noise Reduction, Sens-up, Anti Color Rolling, Highlight Eclipse, RS-485 Interface and Intelligent IR Control.

A. High Resolution of 600TVL(Color) / 650TVL(B/W)

WideLux WDR Technology reproduces high resolution of 600TVL at daytime and 650TVL at nighttime. New DSP by employing the special timing generator and accompanying signal processing provides a special mode of CCD operation to increase the resolution also in the vertical direction like almost its horizontal resolution.
Conventional WDR	WideLux WDR

B. Remarkable WDR Performance

Wide Dynamic Range Camera solution uses two channels to provide the full information about the scene being imaged. In popular terminology, so-called a “Long” channel (long exposure) provides information about the dark portion of the scene, while so-called a “Short” channel (short exposure) features brightly lighted portions of the same scene. The ratio between “Long” and “Short” exposures defines the extent of the dynamic range that the camera is able to handle. This new WDR Technology offers much more contrast WDR performance with the extent of the Short Exposure than the current WDR technology in the market.
Conventional WDR	WideLux WDR

C. Super Low Light Performance with Single Scan CCD

Current WDR camera solutions are based on the Double Scan CCD that has almost two times lower sensitivity compared with Single Scan CCD named as 1/3” Sony Super HAD CCD WideLux technology provides a special timing and accompanying signal processing to 1/3” Sony Super HAD CCD that operates the sensor at a dual scan rate in situations requiring Wide Dynamic Range imaging. Whenever the ambient lighting becomes weak, new WDR chip automatically reverts to the single scan operation and achieves twice better sensitivity.
Conventional WDR w/Double Scan CCD	WideLux WDR w/Single Scan CCD

D. 2D/3D Noise Reduction

2D/3DNR achievement is another reference in WideLux WDR technology. It reproduces noiseless images with 2D/3D filtering Noise Reduction Technology so that users can save the volume of storage media and HDD capacity in DVR. 2DNR helps preserved edges in the picture. When the object moves under low light conditions, the image is inevitably blurred because of using the camera memory. But, 3DNR Technology realizes clear images with no ghost effect.
Conventional	3DNR

E. Anti Color Rolling

When operating a wide dynamic range camera in an environment with a fluorescent lighting, an effect that is called "color rolling" usually happens due to the lack of the synchronization between the camera and the neon light. Improper synchronization causes short channel to acquire an image which spans different sections of the sinus wave that is powering the fluorescent lamp. Colors in the final image are floating, changing their tint with a slow periodicity. WideLux WDR technology based system tracks the light changes relative to the camera and adapts its own timing to the periodicity of fluorescent illumination to the sample light at a constant phase, virtually eliminating the color rolling effect.
Conventional	WideLux WDR

F. Intelligent IR Control

When the objects come closer to the IR light shooting area, the objects become all WHITE, making the image totally unrecognizable in conventional IR cameras. New WDR Technology achieved a special technology that analyzes the strength of light reflection of the objects and automatically adjusts the image quality clearly recognizable when the objects get closer to the IR shooting area.
Conventional	WideLux WDR