What is the main workflow of the machine vision system?

What is the main workflow of the machine vision system?

The workflow of the complete machine vision system is as follows:

computer vision

1. The workpiece positioning detector detects that the object is close to the center of the field of view of the camera system and sends a trigger pulse to the image acquisition part.

2. The image acquisition part sends the start pulse to the camera and the lighting system according to the preset program and delay.

3. The camera stops the current scan and starts a new frame scan again, or the camera is in a waiting state before the start pulse arrives and starts the frame scan after the start pulse arrives.

4. Turn on the exposure mechanism before the camera starts a new frame scan, and the exposure time can be set in advance.

5. Another start pulse turns on the lighting, and the lighting on time shall match the camera exposure time.

6. After the camera is exposed, the scanning output of one frame of image is officially started.

7. The image acquisition section receives the analog video signal and digitizes it through a / D, or directly receives the digital video data digitized by the camera.

8. The image acquisition section stores the digital image in the memory of the processor or the computer.

9 The processor processes, analyzes and identifies the images to obtain measurement results or logic control values.

10. The processing results control the action of the assembly line, position the assembly line, correct the motion error, etc.

From the above workflow, we can see that machine vision is a relatively complex system. Since the objects monitored by the system are mostly moving objects, the action matching and coordination between the system and moving objects is particularly important, which puts forward strict requirements for the action time and processing speed of each part of the system. In some application fields, such as robot and flying object guidance, there are strict requirements on the weight, volume and power consumption of the whole system or part of the system