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The Quad X2 also uses the same connector as the Quad Controller to run lights in a Photometric Stereo configuration.Įach quadrant provides the opportunity to illuminate from multiple directions or with multiple wavelengths.Face recognition has received much interest in the last decade, as the need for reliable personal identification security has become ever more critical. Ideal for computational imaging applications, including photometric stereo, extended depth of field, combined bright field dark field, high dynamic range, and high resolution color.Īs with the DCS-400E, it provides control for computational imaging, including photometric stereo, extended depth of field, combined bright field dark field, high dynamic range, and high resolution color. This provides users the ability to automatically time a lighting sequence and output a correlated camera trigger, and to do so through multiple pre-programmed routines.
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Multi-light stations are currently limited to a group of identical light heads, wired with the same cable lengths into a common Quad (Q4) Connector.Ī future development will allow the Quad Controllers to drive up to eight different configured lights simultaneously.Īs a note, due to power output constraints, some configurable light lengths may be limited.īuilt-in, pre-programmed sequencing allows users to progress through pre-determined recipes. The metallic surface also presents a challenge with unwanted glare. The varying heights of the objects threads create significant shadowing, making it very difficult to visually inspect for defects.
#Photometric stereo software software#
Photometric Stereo Software Code Without Excessiveīecause of the reflective and concave surface characteristics of the bottom of the bottle, it is difficult to illuminate the printed lot code without excessive specular reflections. The following sample applications feature varying challenges to demonstrate the benefits of applying photometric stereo. It then processes the images together to establish local surface properties and recreate the local shape of the object, producing an image with acceptable contrast otherwise unidentifiable with a single lightcamera inspection setup.Įach option provides the opportunity to illuminate from multiple source directions, or with multiple wavelengths, to achieve the necessary differing surface albedos. To process the images, the Photometric Software tracks specific points on the object throughout each of the captured images, owing to the variation in surface reflectivity generated from the different point source directions, with respect to the static camera point of view.
#Photometric stereo software series#
Photometric Stereo Software Series Of AutomaticallyĪn image is typically acquired from each of four quadrants, effectively producing a series of automatically registered images, each from a different light source direction.
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In effect, Photometric Stereo techniques separate the surface albedo from the underlying surface shape by exploiting surface reflectivity variations as a function of changes in incident illumination direction, with respect to a static viewer orientation. To achieve feature-appropriate surface contrast on these difficult object surfaces and ultimately gather a 3D perspective, Photometric Stereo may be applied to vary the direction of incident illumination between successive views, while holding the viewing direction constant.Īn important factor in Photometric Stereo for machine vision is that the surface albedo is a direct result of the spectral and angular distributions of the incident light rather than any inherent characteristic of the object being inspected meaning an adjustment of the illumination on the surface of the object will result in an identifiable, adjusted surface albedo.
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Therefore, it may be ineffective in certain applications, because local surface shapes (including embossing or other 3D details) cannot, in general, be determined from the intensity value recorded at a single image point. Photometric Stereo Software Series Of Automaticallyįor many surfaces, simple defects such as scratches and dents are easily identifiable with a machine vision camera and a traditional lighting solution.Ī standard vision light and camera configuration, typically used in machine vision, only captures images from a single illuminationviewer perspective.Photometric Stereo Software Code Without Excessive.
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