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Your outdoor security camera uses a light sensor to create an image from the light entering through the lens. The light sensor is made up of many pixels which determine how much light is coming through and generates the corresponding number of electrons. Brighter lights generate more electrons per pixel. When it comes to image sensor technology, there are two main types.
These two types are the charge-coupled device, or CCD, and the complementary metal-oxide semiconductor, or CMOS. And despite being viewed as rivals in the camera industry, each type of image sensor really has its own strengths and weaknesses. So the better sensor depends on the situation it is to be used in.
CCD sensors were developed specifically for the camera industry while CMOS traces it's beginnings to standard technology already in use in areas such as memory chips inside PCs. Today, modern CMOS sensors are advancing in technology and the quality is improving immensely.
CCD sensors are still slightly better in light sensitivity and produce cleaner images than CMOS sensors. Because of higher light sensitivity, the CCD produces sharper images in low light conditions than CMOS sensors.
The downside is that CCD sensors are more expensive and harder to build into a camera. Also, a CCD sensor uses much more power, almost 100 times more, than the equivalent CMOS sensor.
With the CMOS sensor, it is very quickly closing the gap in terms of image quality to the CCD sensor. Cameras that are built with CMOS sensors are lower in cost because the cameras are much easier to build.
The CMOS sensors allow for much more integration possibilities and functions than the CCD could. It also has a faster readout which is important when you get into megapixels and require less energy and a smaller system size. You will find megapixel CMOS cameras much more than a megapixel CCD sensor simply because of the cost differentiation.
When it comes to megapixel sensors in cameras, the sensors themselves are about the same size or only slightly larger than traditional VGA sensors. This means that the size of each pixel is smaller. So while the megapixel camera can provide higher resolution and greater detail, it is less light sensitive since the pixel size is smaller and light reflected from an object is spread to more pixels.
These two types are the charge-coupled device, or CCD, and the complementary metal-oxide semiconductor, or CMOS. And despite being viewed as rivals in the camera industry, each type of image sensor really has its own strengths and weaknesses. So the better sensor depends on the situation it is to be used in.
CCD sensors were developed specifically for the camera industry while CMOS traces it's beginnings to standard technology already in use in areas such as memory chips inside PCs. Today, modern CMOS sensors are advancing in technology and the quality is improving immensely.
CCD sensors are still slightly better in light sensitivity and produce cleaner images than CMOS sensors. Because of higher light sensitivity, the CCD produces sharper images in low light conditions than CMOS sensors.
The downside is that CCD sensors are more expensive and harder to build into a camera. Also, a CCD sensor uses much more power, almost 100 times more, than the equivalent CMOS sensor.
With the CMOS sensor, it is very quickly closing the gap in terms of image quality to the CCD sensor. Cameras that are built with CMOS sensors are lower in cost because the cameras are much easier to build.
The CMOS sensors allow for much more integration possibilities and functions than the CCD could. It also has a faster readout which is important when you get into megapixels and require less energy and a smaller system size. You will find megapixel CMOS cameras much more than a megapixel CCD sensor simply because of the cost differentiation.
When it comes to megapixel sensors in cameras, the sensors themselves are about the same size or only slightly larger than traditional VGA sensors. This means that the size of each pixel is smaller. So while the megapixel camera can provide higher resolution and greater detail, it is less light sensitive since the pixel size is smaller and light reflected from an object is spread to more pixels.
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