Supported by the synergy of dual-level intensity projection, multi-frequency fringe projection, and an iterative method for distortion compensation, MS-BLIP can accurately discern spatially separated 3D objects with highly varying reflectance. To overcome these limitations, researchers at the INRS Énergie Matériaux Télécommunications Research Centre in Quebec, Canada developed a technique they termed Multi-Scale Band-Limited Illumination Profilometry or MS-BLIP. PSFPP works by first projecting sets of phase-shifting sinusoidal fringe patterns onto 3D objects and then analyzing deformed structure images reflected from the objects to retrieve 3D surface information.Įxisting PSFPP techniques have fallen short in simultaneously providing the robustness in solving spatially isolated 3D objects, the tolerance of large variation in surface reflectance, and the flexibility of tunable working distances with meter-square-level fields of view at video rate. Dynamic 3D surface imaging by phase-shifting fringe projection profilometry (PSFPP) has been widely implemented in diverse applications, including industrial manufacturing, archaeological inspection, entertainment, and biomedicine. Either one camera with 4 channels, 2 cameras with 2 channels or 4 cameras with one channel each can be operated directly on a 4-channel frame grabber.Profilometry is an imaging technique used to extract topographical data from a surface in order to obtain surface morphology, step heights and surface roughness. This allows using several cameras on one grabber. Multi-Camera: CoaXPress interface offers the possibility of multi-camera control.All setting parameters can be controlled directly via the frame grabber’s GenICam explorer. Plug and Play: The camera communicates directly with the frame grabber via the standard GeniCam, therefore no SDK or control software is required for the camera.However, if you compare the price/Gbit/s, the overall costs is more favorable. Costs: Prices for a CoaXPress setup are somewhat more expensive than systems that use standard interfaces available in the PC due to the additional component of the frame grabber.There is a wide product range with many suppliers (>50) in the area of cameras, cables, frame grabbers and repeaters. Usage: Since CoaXPress was published as an official standard in 2011, the interface has become established and is widely used in the high-end machine vision sector.Pre-Processing: Many frame grabbers offer the possibility to perform calculations directly on the grabber in real time (laser line extraction, blob, compression, etc.) which leads to faster results and accelerates image processing.This means that processor is available for subsequent image processing. ![]() Processor load and Grabber: The advantage of using frame grabbers is the minimal process load on the PC system data transfer from the grabber to PC memory is direct via DMA.The local power supply is not necessary which simplifies installation. ![]()
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