Case Study: High-Intensity LEDs & Automotive Inspection (vehicle body panel inspection)
LED Color Temperature in Machine Vision
When specifying LED lighting for machine vision applications, the LED wavelength can have a significant impact on the success of the vision inspection. When utilizing white LEDs, it’s important to understand that the radiated emissions are a combination of most of the wavelengths from the visible spectrum; for white LEDs, the color temperatures range from […]
Meat Processing Inspection with UltraSeal Washdown Backlights
May 6, 2021 | Application Notes | By: John Thrailkill Machine Vision Challenge: Meat Processing & Inspection Achieving pinpoint accuracy with a vision system while maintaining the highest levels of sanitation within automated meat processing is a must. The inspection system must identify foreign objects, whether bits of metal or plastic, while being rugged enough to withstand the challenging […]
CSI, Inc. Cement Board Inspection Application
Machine Vision Challenge: Cement Board Inspection A customer inspecting 4 ft. by 10 ft. white fiber-cement boards required a lighting solution to highlight small 5cm long and 1mm thick surface scratches and defects. They also identified significant surface concavity created during the manufacturing process on some of the 2cm thick boards. As a result, they […]
Photometric Stereo Technique
Machine vision is commonly deployed in part inspections to gather feature-appropriate identifying information from an object’s surface and to increase the speed, accuracy and consistency of the inspection process. For many surfaces, simple defects such as scratches and dents are easily identifiable with a machine vision camera and a traditional lighting solution. However, some objects […]
Application Note: Semiconductor Chip Inspection with Cyth Systems
View original application note on Cyth System’s website here. Machine Vision with Deep Learning and Artificial Intelligence are among the future trends for automated testing in many different industries, especially manufacturing. But what if you need a vision system to recognize or verify organic objects? What if you need a system that doesn’t just recognize […]
When Adequate Lighting Isn’t “Good Enough”
Compared to today, early machine vision lighting was limited in several ways – there were few choices in source type, style, geometry, and wavelength. Many vision inspections either failed outright or succeeded largely on the only available lighting sources and types available: task-specific fiber-optic or fluorescent lights and/or ambient lighting. Those applications that required more […]
Cylindrical Surface Inspection
Not all surfaces respond similarly to standard direct illumination techniques. Surface color, texture, shape, and composition can all influence where and how much of the incident light is reflected into a vision camera, greatly affecting the inspection results. For example, when examining print for OCV or OCR applications, a particularly difficult application is to uniformly […]
Lighting Technique: Using Polarizing Filters in Machine Vision
While developing an effective and robust vision lighting solution, machine vision engineers often face a near-universal obstacle on the plant floor: unwanted glare. This glare typically comes from the very parts intended for inspection or their immediate background, but it can also be from factory overhead lighting, dedicated task lighting or even natural sources. For purposes […]
Bright Field vs. Dark Field Lighting Techniques
Determining whether to apply lights in a bright field versus dark field geometry is one of the more difficult decisions facing Machine Vision engineers. Bright field lighting is the more commonly applied lighting geometry, which involves mounting and orienting lights between 90 and 45 degrees from the imaging surface (off horizontal). Conversely, dark field lighting […]