Why should a machine vision defect detection system use light sources? What are the characteristics?

The core of machine vision defect detection system is image acquisition and processing. All information comes from the image, and the quality of the image itself is crucial to the whole machine vision defect detection system. The light source is an important factor affecting the image acquisition of machine vision defect detection system. There is no doubt that it directly affects the quality of input data.

Through the appropriate light source lighting design, the target information and background information in the image can be best separated, which can greatly reduce the difficulty of image processing algorithm segmentation and recognition, and improve the positioning and measurement accuracy of the system, so that the reliability and comprehensive performance of the system can be improved.

On the contrary, if the light source is not designed properly, it will lead to less effort in the design of image processing algorithm and imaging system. Therefore, the success or failure of the design of light source and optical system is the primary factor that determines the success or failure of machine vision defect detection system. In the machine vision defect detection system, the role and characteristics of the light source are at least the following:

The role of light source:

1. Used as a measurement tool or reference;

2, illuminate the target, improve the target brightness;

3. Overcome ambient light interference to ensure the stability of the image;

4, the formation of the most conducive to image processing imaging effect;

Characteristics of light source:

1, a variety of compact design, save space;

2, optional diffuser guide light, light uniform diffusion

3, ring light provides different irradiation angles, the same color combination, can highlight the three-dimensional information of the object;

4. Solve the problem of diagonal irradiation shadow;

5, high-density LED array, high brightness;

Since there is no universal machine vision lighting equipment, so for each specific application instance, to design the shadow lighting device, in order to achieve the best results.