Digital video:
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Digital video is a video capture device such as a video camera that converts the color and brightness information of an external image into an electrical signal and records it to a storage medium.
Camera:
A camera is a key component in a machine vision system. Its most essential function is to transform an optical signal into an ordered electrical signal. Choosing the right camera is also an important part of the design of the machine vision system. The camera not only directly determines the image resolution and image quality, but also directly relates to the operation mode of the whole system.
Resolution:
The number of pixels (Pixels) of the image captured by the camera each time is generally directly related to the number of pixels of the photoelectric sensor. For analog cameras, it depends on the video system. The PAL system is 768*576, and the NTSC system is 640*. 480.
PixelDepth:
That is, the number of bits per pixel of data is generally 8Bit, and for digital cameras, there will be 10Bit, 12Bit, etc.
Maximum frame rate (FrameRate) / line frequency (LineRate):
The rate at which the camera captures the transmitted image is generally the number of frames acquired per second (Frames/Sec.) for the area array camera and the number of lines (Hz) collected per second for the line array camera.
Exposure and Shutter:
For line array cameras, they are progressively exposed. You can select the fixed line frequency and external trigger synchronization. The exposure time can be consistent with the line period, or you can set a fixed time. The area array camera has frame exposure and field. There are several common ways of exposure and scrolling, and digital cameras generally provide the ability to externally capture images. Shutter speeds typically range to 10 microseconds, and high speed cameras can be faster.
Cell size (PixelSize):
The cell size and the number of pixels (resolution) together determine the size of the camera's target surface. Currently, digital camera pixel sizes are generally from 3 μm to 10 μm.
SpectralRange:
It refers to the sensitivity of the pixel sensor to different light waves. The general response range is 350nm-1000nm. Some cameras add a filter in front of the target to filter out the infrared light. If the system needs to be sensitive to infrared light, the filter can be removed.
Target size:
Refers to the size of the camera's sensor chip, which is 1 inch, 2/3 inch, 1/2 inch, 1/3 inch, 1/4 inch, etc. The smaller the number of inches, the smaller the field of view.
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