What is an Image Sensor? An image sensor is the part of your IP camera that captures the light hitting the camera lens and turns it into electrical signals, which get recorded as the video you see when monitoring your system. There are two types of image sensors found in IP surveillance cameras, the newer CMOS image sensors and CCD image sensors. How Image Sensors Work As light passes through your camera lens, it hits the image sensor. The sensor is made up for many little photosites (each photosite becomes a pixel in the video resolution), and the amount of light on each individual photosite determines how much light will be in each pixel of your video. Together, the light/dark sections of each pixel make up one cohesive image in the final video.
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For IP cameras, there are two types of image sensors: • CCD (charge-coupled device) image sensors have been around for over 30 years, and are often found in older models of cameras • CMOS (complementary metal-oxide semiconductor) image sensors utilize newer technology to record better HD resolution and fast-moving activity, and are found in the majority of IP new cameras How Image Sensors Help You Every IP surveillance camera needs an image sensor to create a video. For high quality surveillance video, the newer CMOS image sensors help ensure your video stays clear even at high resolutions or when objects are moving.
Image sensors are available in video surveillance systems and IP security cameras from top manufactures including Optica, Axis, and Mobotix. Learn more with VideoSurveillance.com With a team of knowledgeable sales and technical support representatives, VideoSurveillance.com can help you learn more about image sensors. Call us at (866) 945-6808 or today!
Freebsd Usb Serial Driver. As the camera’s sensor is photosensitive. When light photons are collected in the photosites (one photosite for each pixel), a tiny electrical charge is produced.
The brighter the light, the more photons are collected, and a higher electrical charge is generated. Different pixel photosites will register different electrical charges and, once the exposure is complete, each individual pixel photosite’s electrical charge must be measured and then turned into a digital value by an analogue-to-digital converter. From then on, the process is entirely digital. Being an up-to-date camera image sensor, it is a CMOS type, or Complementary Metal Oxide Semiconductor. Older cameras and even some current ones use a different type of sensor chip called a CCD, or Charge-Coupled Device.
CMOS sensors are cheaper to make, but used to be inferior in sensitivity and noise performance. Thanks to steady technical refinement, CMOS sensors are now the image sensor of choice. To make colour images, pixel photosites that make up a sensor need to register the brightness of red, green and blue light. In a conventional sensor, a quarter of the pixels record red light, another quarter blue light and half the pixels record green light. This is achieved by placing a coloured filter above each pixel photosite, also known as a The camera’s image processor then interpolates the colour data in neighbouring photosites to assign a full colour value to each pixel.
However, this means that the colour resolution of an image is much less than the luminance (brightness) resolution – unless you’re using a Foveon sensor, which registers red, green and blue for every image pixel.