Machine vision is a branch of rapid development of artificial intelligence.To put it simply, the machine vision is to measure and judge the use of the machine with the eye.The machine vision system is a machine visual product (that is, the image intake device, divided into two types of CMOS and CCD) to convert the target to image signal and transmit it to the dedicated image processing system to obtain the morphological information of the target photographed. According to the pixel distribution and the pixel distribution andInformation such as brightness, color, etc. transform into a digital signal; the image system performs various operations of these signals to extract the characteristics of the target, and then controls the equipment movements on the scene based on the results of the discrimination.
What are the characteristics of machine vision
照 The automatic camera of the camera is automatically matched with the speed of the subject, and the ideal image is taken;
寸 The size range of parts is 2.4mm to 12mm, and the thickness can be different;
不同 The system selects workpieces of different sizes according to the operator, calls the corresponding visual program for size detection, and outputs the result;
的 For different sizes of parts, sorting devices and conveying devices can accurately adjust the width of the material channel, so that parts exercise on the fixed path and perform visual detection;
辨 The resolution of the machine vision system reaches 2448 × 2048, and the dynamic detection accuracy can reach 0.02mm;
为 为 为 ⒍ ⒍ ⒍ ⒍ 0;
像 This system can display the detection results dynamically through the detection data displayed by the interface by displaying the image monitoring and detection process;
件 Have the functions of eliminating control signals and removal of waste products in time and accurate workpiece;
主要 The system can self -check whether the status of its main equipment is normal and equipped with a state indicator; at the same time, it can set up system maintenance personnel and users of different operating permissions;
面 Real -time display detection screen, Chinese interface, can browse images of unqualified products several times, have the function of being able to store and inspect the error workpiece image in real time;
信息 can generate error results information files, including corresponding error images, and can print output.
What are the selection of machine vision
In the machine vision system, it is essential to obtain a high -quality processed image.The reason why the system is successful is to ensure that the image quality is good and the characteristics are obvious.The reason why a machine visual project fails is that most of the cases are caused by poor image quality and not obvious features.To ensure good images, you must choose a suitable light source.
Basic elements of light source selection:
Comparison: Comparison is very important for machine vision.The most important task of the lighting of machine visual applications is to produce the maximum contrast between the characteristics of observation and the image features that need to be ignored, which is easy to distinguish the characteristics.The contrast is defined as a sufficient difference in gray measurement between the characteristics and the surrounding areas.Good lighting should be able to ensure that the characteristics that need to be detected are protruding from other backgrounds.
Brightness: When choosing two light sources, the best choice is the brighter one.When the light source is not bright enough, there may be three bad cases.First, the signal -to -noise ratio of the camera is not enough; because the brightness of the light source is not enough, the contrast of the image must not be enough, and the possibility of noise on the image also increases.Secondly, the brightness of the light source is not enough, and the aperture must be increased, which reduces the depth of field.In addition, when the brightness of the light source is not enough, the impact of random light such as natural light will have the greatest impact on the system.
Robbing: Another method of testing the light source is to see if the light source is minimal to the position of the part.When the light source is placed in different areas or different angles of the camera view, the result image should not change.The strong directional light source increases the possibility of mirror reflection in high -bright regions, which is not conducive to the later feature extraction.
A good light source needs to be very obvious that you need to find the characteristics. In addition to the camera that can shoot components, good light sources should be able to produce the maximum contrast, sufficient brightness, and not sensitive to the position of the component.The light source is selected, and the rest of the job is much easier.The specific light source selection method is also the practical experience of the test.

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