Specular
Specular news and technical articles from Vision Systems Design magazine. Search Specular latest and archived news and articles
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Machine-vision systems exploit uniform illumination to reduce inspection errors
… years, off-the-shelf illumination systems have allowed specular parts and surfaces, such as surgical instruments or knurled ..... quality," p. 22). Companies requiring the inspection of specular parts were left with only partial solutions, none of which …
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Lighting system produces shape from shading
To image highly specular surfaces such as compact-disk artwork and solder pads on printed-circuit boards (PCBs), many machine-vision systems incorporate …
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How to select lighting and optics for Vision Systems
… transparent and opaque types. Removing specular reflection By controlling the lighting ..... imaged with polarized light forms surface specular reflections that are composed of polarized ..... camera lens. Total elimination of the specular components is achieved when the filter …
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Novel Illumination
… lights increase the contrast between specular , diffuse, or absorptive surfaces ..... tire rims that exhibit a high degree of specular reflectance (see Fig. 2). FIGURE ..... rims) that exhibit a high degree of specular reflectance. In the past, dome lights …
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Novel Illumination
… lights increase the contrast between specular , diffuse, or absorptive surfaces ..... tire rims that exhibit a high degree of specular reflectance (see Fig. 2). FIGURE ..... rims) that exhibit a high degree of specular reflectance. In the past, dome lights …
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LEDs Line Up to Illuminate Web Inspections
… working distance optics or long working distances that are adjustable from 90 to 150 mm (see Fig. 4). For reflective or specular surfaces, an additional holographic diffuser film can be added to the optics; it further enhances line profile. Just as …
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Lighting design enables vision systems
… needed to accommodate highly reflective ( specular ) or highly diffuse surfaces, gently ..... gently curved surface that is highly specular , a diffuse on-axis light (DOAL) should ..... With this coaxial lighting approach, specular surfaces perpendicular to the camera …
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Model World
… size of the light, and if there are specular reflections or shadow casts at the object ..... backlights. While it is important to consider specular reflections when using spotlights, it ..... order reflections, regions with direct specular reflections can be identified.” To …
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Lighting setup aids web inspection of rolled steel
… reflected. Most of this reflection is specular , which means that the angle of incidence ..... is reflected in directions other than specular . When the scattered light leaves the ..... on the same side of the normal as the specular component, but is not purely specular …
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Vision-guided robot automates vegetation analysis
… Kowa Optimed (Torrance, CA, USA), the camera is fitted with a polarizing filter from Sony (Tokyo, Japan) to reduce specular reflectance caused by outdoor illumination. Positioned approximately 0.6 m from the ground and angled at 20°, the system …