Lighting in Image Processing
If I can't read the writing on a piece of paper, there's usually a simple solution: I hold the text under a lamp. If I want to see faint contours on the paper, I hold the sheet up against the light and they're more visible. In other words, the type and intensity of illumination make a difference.
Proper lighting is one of the essential elements of any successful image processing system for inspection tasks. A well-selected lighting system has a decisive impact on the quality of the image, and with it the effectiveness of the system. In simple terms, lighting helps determine whether an inspection task is handled efficiently or not. It's not difficult to find the right lighting for your vision system. 80% of applications work well with LED ring, bar or backlights. In many cases the user can easily modify or optimize the lighting to boost an image's brightness.