CMOS cameras operate at lower voltages than CCDs, reducing power consumption for portable applications. Analog and digital processing functions can be integrated readily onto the CMOS chip, reducing system package size and overall cost. Each CMOS active pixel sensor cell has its own buffer amplifier, and can be addressed and read individually. A commonly used cell has four transistors and a photosensing element. The cell has a transfer gate separating the photosensor from a capacitive "floating diffusion", a reset gate between the floating diffusion and power supply, a source-follower transistor to buffer the floating diffusion from readout-line capacitance, and a row-select gate to connect the cell to the readout line. All pixels on a column connect to a common sense amplifier.
CMOS cameras are available in either monochrome or color configurations. Monochrome cameras capture images in black and white or grayscale. In color CMOS cameras, a range of colors is generated with varying combinations of different discrete colors. One common technique is sensing the red, green, and blue components (RGB) and combining them to create a wide spectrum of colors. Some styles of color CMOS cameras capture color using multiple chips, where each chip is dedicated to capturing part of the color image, such as one color, and the results are combined to generate the full color image. These cameras typically employ color separation devices such as beamsplitters rather than having integral filters on the sensors.
More >>|
Axis IP network cameras - Product guide: Fixed network cameras Fixed cameras Fixed domes PTZ cameras Network cameras Product list Product comparison See AXIS Communications Information |
|
|
- PolarisUSA - Security Cameras, Video Surveillance Systems,... · Box Security Cameras · Bullet Security Cameras · Dome Security Cameras · PTZ Security Cameras See PolarisUSA Video, Inc. Information |
|
|
HowStuffWorks "How Digital Cameras Work" Cameras & Photography ? Camera Basics Digital Cameras > Cameras & Photography > Digital Cameras |
Of Interest
