In certain light source conditions, the use of line switching to convert the image from color to black and white. In the color / black and white line conversion technology evolution, the early use of two Sensor (1 color, 1 black and white) **** with a set of circuits and then switch.
This type of camera has a single CCD (color) design, during the day or when the light source is sufficient for the color camera, when the night falls or when the light source is insufficient (generally in 1LUX?3LUX) that is, the use of digital circuitry to eliminate color signals to become a black-and-white image, this approach can be achieved at night, although the "low illumination" purpose, but during the day, it is not the case that the color signal will be eliminated. This approach can be achieved at night "low illumination" purpose, but during the day there is a fuzzy image, the color is not natural shortcomings.
Expanded:
Technical Parameters
Product Name, Day/Night Full Color Camera
Sensor, 1/3" SONY Super HAD II CCD
PAL:752(H) x 582(V)/NTSC :768(H) x 494(V), Scanning Mode
Interlaced, Sync Mode
Internal Sync, Horizontal and Vertical Frequency
PAL:15.625 kHz, 50.00 HZ / NTSC :15.734kHZ,59.94HZ
Sharpness, Color 520 lines
Video Output<
1.0Vp-p/75Ω composite video signal
Signal-to-Noise Ratio (SNR)
More than 50dB (with Auto Gain Off)