Industrial machine vision cameras and analog cameras into digital cameras based on different data output mode , the analog
camera output analog signals, digital camera output digital signals.
Machine vision technology is mainly used in many fields of visual detection, object recognition, automatic quality inspe-
ction , process control, parameter measurement and automatic assembly and so on. In these systems , industrial cameras
is to determine the key components of cost, speed and accuracy , while the analog cameras and digital cameras, accordin-
g to their respective characteristics also have different industrial applications, and understand the camera's performance
specifications and a variety of visual tasks the importance of such deposit for the machine vision industry control is the
ost basic step.
In the design of industrial machine vision systems , digital cameras and analog cameras have their own advantages and
disadvantages, but ultimately to be selected according to the operating costs and some of the key factors, such as when
these factors , one of which will become clear technical advantage of the . For an application , the right to choose what
kind of camera , depending on machine vision systems want to achieve what purpose, to seriously consider the camera's
performance and cost when selecting cameras for machine vision systems, although inexpensive analog cameras than
digital cameras, but they the lower resolution and image quality , it may be limited to less demanding applications, digital
cameras expensive than analog cameras , but their cost may be worth it for a high speed , high accuracy , high precision
applications pay .
Must bring a digital camera and an analog capture card , a standard analog camera resolution is very low , while the
frame rate is fixed. This should be selected according to the actual needs . In addition to the analog cameras capture an
analog signal, the digital capture card to convert a digital signal to be transmitted is stored . Analog signal may be due to
other devices within the plant ( such as a motor or a high-voltage cables ) electromagnetic interference caused by
distortion.
With the increase of the noise level , the dynamic range of analog cameras ( with the original signal to noise ratio ) is
reduced. Dynamic range determines how much information can be transferred from the camera to the computer . A
digital camera to capture a digital signal, a digital electrical signal from noise, and therefore , the higher the dynamic range
of the digital camera , the computer can be a more accurate signal transmission .
Throughout the development of the industry , the industry generally believe that digitization will be the development
trend in the field of machine vision , is a standard type of industrial cameras , and digital cameras will eventually replace
analog cameras.