Explain the main points of machine vision light source selection

Machine vision light source is an important factor affecting the image level of the machine vision system, because it directly affects the quality of the input data and the application effect of at least 30%. Below Dehong Technology specifically share the selection points of machine vision light sources, for reference only.

1. Brightness: When selecting a machine vision light source, the best choice is to choose the brighter one.

2. Robustness: The method of testing machine vision light source is to see if the light source has the least sensitivity to the position of the component. When the machine vision light source is placed in different areas or different angles of the field of view of the lens, the image should not change accordingly.

3. Machine vision light source is predictable: When the machine vision light source is incident on the surface of the object, the reflection of the light source is predictable. The light source may be absorbed or reflected, and the angle of incidence of the reflected light is equal to the angle of reflection.

4. Controlling reflection: If the reflected light can be controlled, the image can be controlled. Therefore, when it comes to the design of machine vision light sources, the most important principle is to control the degree of light source reflection to the lens and reflection.

5. Machine vision light source position: The light source reflects according to the incident angle, so the position of the light source is very important to obtain a high contrast image. Predicting how the light source reflects on the surface of the object can determine the position of the light source.

6, surface texture: the surface of the object may be highly reflective (specular reflection) or highly diffuse reflection. The main factor that determines whether an object is specular or diffuse is the smoothness of the surface.

7. Surface shape: A spherical surface reflects the light source in a similar way to a flat object. The more complicated the shape of the surface of an object, the more complicated the light source changes on the surface.

8. Machine Vision Light Source Uniformity: A uniform light source will compensate for changes in the angle of the surface of the object. Even if the geometry of the object surface is different, the reflection of the light source in each part is uniform.

9. Application of machine vision light source technology: The light source technology is to design the shape and position of the light source so that the image contrast is high. Light sources can highlight areas of interest that require machine vision analysis.