Security Cameras Features - Image Sensor

CCD Image sensor - Image Sensor in Miami, Florida | Dicsan Technology

CMOS image sensor & CCD Image sensor

ideal solution for a variety of security applications

Every surveillance camera system needs an image sensor to create a video. An image sensor is the part of a security camera that captures the light hitting the camera lens and converts it into electrical signals. It is a chip made up of millions of light-sensitive components (photodiodes or phototransistors) that capture the projected waves of a lens, which makes up the image. Image sensors can be used in devices, such as digital/security cameras, medical and vision equipment. Image sensors range in size, but the most common are 1/2.8″ and 1/3″. The image sensor dimension impacts the security camera's field of view for a given lens as well as the light sensitivity.

When a video camera is manufactured, there are two main technologies that can be used for the image sensor: CCD (Charged Coupled Device) and CMOS (Complementary Metal-Oxide Sensor). CCD and CMOS image sensors are two different technologies for capturing images digitally. Both types of imagers convert light into electric charge and process it into electronic signals. While CCD and CMOS sensors are often seen as rivals, each has unique strengths and weaknesses that make it appropriate for different security cameras applications.

CCD Image Sensor - Security Cameras

CCD stands for Charge Coupled Device and is one of the oldest image-capture technologies used on surveillance cameras. CCD image sensors have been around for over 30 years, and are often found in older models of cameras. The image quality in an CCD image sensor is good because it produces less noise and better sensitivity than in a CMOS image sensor. However, the only disadvantage is its heavy circuitry which is required outside the sensors for conversion and amplification and need heavy power consumption. CCD sensors are more expensive and more complex to incorporate into a security camera. The increase power consumptions may sometimes result in issues like excessive heat generation within the CCTV camera. A CCD sensor can consume up to 100 times more energy than an equivalent CMOS sensor. CCD sensors are also more expensive and more complex to incorporate into a security camera.

CMOS Image Sensor - Security Cameras

CMOS stands for Complementary Metal-Oxide Semiconductor, also known as active-pixels sensors. Instead of using analog methods to turn light into data, CMOS image sensor make use of transistors situated at each pixel to capture and transform light. This is a much more flexible way to take digital images as each pixel has its own individual transistor path. Additionally, with a CMOS image sensor created in the same way that microchips are, they’re easier to produce using traditional manufacturing methods. This makes CMOS image sensor cheaper to make – and is why IP security cameras are much more affordable now than they were in the past. Most security camera system use a CMOS image sensor, because CMOS image sensor perform better than CCDs, offering faster speeds with lower power consumption. Since CMOS image sensor don’t require a separate image processor like CCD sensors do, they require a lot less power. In comparison with CCDs, a CMOS image sensor have a faster readout (which is advantageous when high-resolution images are required), higher immunity to image noise, lower power dissipation at the chip level, a smaller system size, enable more integration possibilities and more functions.

CCD Image sensor Advantages over CCD - Image Sensor in Miami, Florida | Dicsan Technology

Security Camera Image Sensor - Applications

Image sensors are used primarily in security cameras and in a large number of imaging devices used in industrial, media, medical and consumer applications. CMOS image sensors & and CCD image sensors are widely used in camera modules, camcorders, smart phones, PC cameras, personal digital assistants (PDAs), machine vision, and videoconferencing. Image sensors are also being widely used among toys, games, optical mouse, document scanning, barcode readers and scientific imaging.

Contact Us

CMOS image sensors, and CCD image sensors, are one of the many factors to consider when looking to purchase a security camera. Do you have any questions or would you like to learn more about CMOS image sensors? Contact Dicsan Technology today! Our team of knowledgeable security advisors will be more than happy to answer your questions or provide you with more information regarding image sensors and security cameras.

Other Features

Analog CCTV Security Cameras

Analog CCTV Security Cameras
encode captured images into analog resolution as D1 or 960H.

Security Cameras:
Analog

Analog Security Cameras capture an analog video signal and transfers it over coax cable to a DVR (Digital Video Recorder). The DVR will convert the analog signal to digital, then compress it and store it on a hard drive for later retrival.

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High Definition-Transport Video Interface

High Definition - Transport Video Interface
is a signal processing and transport technology used in HD Security Cameras and DVRs.

Security Cameras:
HD-TVI

HD-TVI Security Cameras currently support video resolution as high as 1080p by using the same coaxing cabling as Analog Cameras use which, makes it easier for people with old Analog CCTV Systems to upgrade to an HD system.

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IP Security Cameras

Internet Protocol Security Cameras, unlike CCTV Analog Security Camera,
send and receives data via a computer network and the Internet.

Security Cameras:
IP

IP Cameras are able to deliver higher resolution and offer digital zoom and on board digital processing. A higher number of pixels will provide a better digital zoom so you'll see further into the distance without degrading the image.

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Megapixel Security Cameras

Megapixel Security Cameras give you HD resolution so you'll be able to record more clear footage. This allows to use fewer cameras and save on maintenance costs.

Security Cameras:
Megapixels

Megapixel Security Cameras deliver the best image quality available, capturing a super high-resolution image and allowing you to digitally zoom in on specific details with great clarity when reviewing recorded Surveillance videos.

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Night Vision Security Camera

Night Vision Security Camera produce clear and detailed full color video in dark conditions.

Security Cameras:
Color Night Vision

Color Night Vision Security Cameras contain powerful image sensors that are more sensitive to light allowing the sensor to absorb more visible light so the cameras will continue to provide full color video images in low-light conditions.

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Thermal Security Camera

Thermal energy travels faster than visible light so a Thermal Security Camera will be able to detect moving heat objects from greater distances than a traditional Security Camera.

Security Cameras:
Thermal

Thermal Seurity Cameras sense thermal energy instead of using visual light to construct images. Since it doesn't see light, it will see at night as well as it does during the day. It sees through obstructions and its not affected by smoke, dust or fog.

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Security Cameras: Wide Dynamic Range

A Wide Dynamic Range Security Camera is capable of switching from color to black and white like a Day/Night Security Camera does.

Security Cameras:
Wide Dynamic Range

Wide Dynamic Range Security Cameras help to figh natural and artificial lighting. These cameras have a special software which allows them to balance too bright or too dark rooms creating a balanced and high resolution video shot.

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Wireless Security Cameras

Wireless Security Cameras offer the same standard features as a wired security camera, including HD quality recording, infrared night vision, and motion detection sensors.

Security Cameras:
Wireless

Wireless Security Cameras allow you to place them up to 1.5 miles away from your local area network. They use top-of-the-line technology to ensure a secure and reliable connection and offer the same standard features as a wired camera.

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Cost of Security Cameras

Although it may seem like a big expense to acquire security systems, at the end it is an investment to protect your most valuable assets.

Security Cameras:
Cost

Having a security system as necessary as paying for services.The price depends on the features and form factors of the equipment, as well as the amount of devices installed, the distance, whether, and if its a wired or wireless system.

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Audio Security Cameras

Adding audio surveillance capability to your CCTV can help make a business safer.

Security Cameras:
Audio

Audio Security Cameras have built-in microphones that allow easy audio recording. Hidden audio security cameras are illegal, so you must get the consent of at least one person in the conversation or hang sign where they are installed.

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Security Cameras Field of View

Hanging a "CCTV recording on premises" sign does not give you consent to record audio. You must specifically state that audio is being recorded.

Security Cameras:
Field Of View

A Network Security Camera can be described as a camera and a computer combined in one unit. Their significantly high video resolution will allow you to capture more area per camera and zoom-in to enhance minor details.

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Security Cameras Image Sensor

Each pixel of an image sensor records the amount of light to which it is exposed and converts it into a corresponding number of electrons.

Security Cameras:
Image Sensor

Image sensor is the element of an electronic camera, which detects and captures the information that makes up the image. This was achieved by converting the attenuation of light waves into electrical signals.

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Power over Ethernet Cameras

Power over Ethernet minimizes the number of wires that must be strung in order to install the network which lowers cost and installation time.

Security Cameras:
PoE

Power over Ethernet (PoE) works by using a single network cable to provide both data connection and electric power over to an IP Security Cameras. This will result in lower cost, less downtime, easier installation and maintenance.

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PTZ Cameras

PTZ cameras are mainly used for surveillance. They are more common for business, military and law enforcement agencies to monitor products or public areas.

Security Cameras:
PTZ

PTZ stands for Pan, Tilt and Zoom. This refers to the capabilities of automated cameras and video recorders. Has the ability to rotate, usually in a full circle, to tilt at different angles up and down, and to zoom in on particular objects.

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Video Compression

Video compression is an important tool to help prevent network traffic from becoming saturated.

Security Cameras:
Video Compression

Video compression techniques consist of reducing and eliminating redundant video data so that the digital video file can be sent through the network and stored. Different compression standards use different methods to reduce data.

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Frame Rate

The frame rate is a parameter that can be set either in the IP security camera, in a video server or in the video surveillance management software.

Security Cameras:
Frame Rate

Frame rate, fps or frames per second, is the number of frames (images) your camera can take per second. The continuous succession of these frames produces the idea of ​​movement because of the minimum differences between them.

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4K-HD

The use of 4K cameras in your system ensures that all the images taken are clear and very detailed.

Security Cameras:
4K

4K security camera is a digital camera with a horizontal resolution of around 4,000 pixels and a vertical resolution of about 2,200 pixels. It is twice as high as the resolution of an existing standard high definition (HD) security camera.

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