Table of Contents
Advertisement
Image processing
4.2 Shutter Speed and Brightness
Remedy by manual overexposure
If this method cannot be used, the user can do the following:
• Use the erasure function on the edges of the model to enable optimally training for the
• Correct the problem by setting the shutter speed offset for automatic exposure control
Other interference affecting object recognition
In addition to the previously mentioned interference, other factors can also have a negative
influence on the search for a pattern.
• Shadows (particularly caused by the depth of the objects)
• Non-uniform lighting
• Geometric distortion by the lens, particularly when the camera is not perpendicular to the
• Blurring due to motion if the shutter speed is too slow for moving parts
There are functions and parameters in the SIMATIC VS120 Vision Sensor to reduce the
negative effects of such interference in recognizing parts. They help to create optimal edges
from the image to generate patterns.
4-4
contour
pattern
This image was manually overexposed. The
contour is ideal and can be clearly recognized.
Vision Sensor SIMATIC VS120
Operating Instructions, Edition 02/2006, A5E00757507-01
Advertisement
Table of Contents
