CCTV camera sensor



Image sensors when choosing an IP camera for CCTV

There are many variables to define, before selecting an IP camera. We will review three different criteria necessary to help evaluate which IP camera is the right one to choose for your CCTV system.
  1. Model: Body style, and location

Depending on where the camera will be physically installed and what is its function? Based on the location, you can better determine what type of body is suitable for where the CCTV camera system is going.

Recommendations:

For the identification of faces (faces - face) or the capture of fine details, the camera must be mounted between 9 feet and 12 feet high.

For the capture of license plates (license plates), the camera must be mounted at a lower height, from 3 to 5 feet. In addition, license plates must be installed in a "narrow" passageway (a bottleneck) where vehicles normally travel slower, and vehicles must go at a speed of less than 10 miles per hour. For example, an entrance of the parking lot.

Image sensor

Image sensors determine the pixel size, and the number of pixels. The larger a sensor, the greater the number of pixels.

A common mistake is to consider that the larger the sensor, the better the image in low light environments. The image size does not have an important role with respect to low light improvement. There are other factors that affect how well image is seen in low light environments, such as night vision.

Some types of image sensors found in IP cameras:

  • 1 / 1.7 "
  • 1 / 1.8 "
  • 1 / 2.3 "
  • 1 / 2.7 "
  • 1 / 2.8 "
  • 1/3 "(This is the most common image sensor for video surveillance use)
  • 1/4 "
Lens types according to their focus and zoom: Motorized varifocal, Manual varifocal, and fixed lens

Motorized varifocal: A motorized lens that can be adjusted during or after installation from a computer or desktop computer. The result in a better return on investment, especially in those cases where frequent lens adjustments are required. These types of cameras are usually more expensive than similar manual models.

Manual varifocal: A lens with manual focus must be adjusted during installation and requires a person to physically focus the lens.

Fixed lens: These lenses have a fixed focal length and cannot be adjusted. These cameras usually cost less than variable focal length cameras.

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