We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies limited to a narrow, high-frequency band. These patterns produce a set of images over which global illumination and defocus effects remain constant for each point in the scene.
Gupta et al. (2012) introduced micro phase shifting, which projected sinusoidal patterns with frequencies limited in a narrow and high frequency band. However, highfrequency illuminations reduce the contrast of the projected patterns, thereby leading to higher errors especially when subsurface scattering dominates. ... ...
In Micro Phase Shifting, since all the frequencies belong to a narrow high-frequency band, all the phase maps have ambiguities. A single unambiguous phase map is computed using the Gushov-Solodkin algorithm . Here, this is illustrated using a V-groove.
Conventional phase shifting techniques face two serious limitations. First, existing techniques assume that scene points are only directly illuminated by the light source. As a result, they recover erroneous shapes for scenes that have global illumination (e.g., interreflections and subsurface scattering).
d.1. IntroductionPhase shifting is one of the most widely used shape measureme t techniques . Because of its precision and low cost, it is applied in surgery, factory automa-tion and digitization of cultural heritage. Like all active scene recovery techniques, phase shifting assumes that scene points are only directly illuminated b
e.1.2. BackgroundPhase shifting belongs to the class of active stereo triang lation techniques. The simplest setup for these techniques consists of a proj ctor and a camera. Depth of a scene point is computed by intersecting rays from the corresponding projector
Gupta et al. (2012) introduced micro phase shifting, which projected sinusoidal patterns with frequencies limited in a narrow and high frequency band. However, …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies …
So current through a capacitor is proportional to the rate of change of the voltage, i.e. it is proportional to the steepness of the voltage-vs-time curve. Given that current …
8.4.1 Phase-Shifting Methods. The phase-shift is most often achieved by using a reference mirror mounted on a piezoelectric transducer (e.g., PZT) [].Phase-shifting can also …
of input images required for Micro PS is considerably reduced. We derive a lower bound on the number of input images required for phase-shifting and show that Micro PS achieves this …
In this paper, a four-step phase-shift digital holography (DH) system using multilayer ceramic capacitors (MLCCs) as actuators is proposed. This system is capable of …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies …
We also derive theoretical lower bounds on the number of input images needed for phase shifting and show that Micro PS achieves the bound. This work considers the problem of shape recovery for real world scenes, …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies …
In the same year, Millerd et al. proposed to replace the phase mask with a pixel-level micro-polarization phase-shift array. The micro-polarization phase-shift array …
Single Phase Motor Start Capacitor, CAPSTART75-250, flying lead connection, 250Vac, 75 Micro Farad. NOTE: If capacitor dimensions are critical, please call us as capacitor dimensions may …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies limited to a narrow, …
The reproduced image eliminates the interference of zero-order images and conjugate images, overcoming the problem that traditional phase-shifting digital holography cannot be measured in real time.
Micro Phase Shifting（）,,（、） …
Consequently, the phase shift will be zero. Therefore the phase shift will vary with frequency from 90° to 0 ° when the frequency changes from nearly zero to infinity. This is because the R-C circuit behaves capacitive at …
The key idea of Micro Phase Shifting is to project sinusoidal patterns with frequencies limited to a narrow, high-frequency band. These patterns produce a set of images over which global …
Unlike standalone phase shifters where the interface with external stimulus is expected, the proposed phase shifter is designed for phase shifting the LO signal within a …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies limited to a narrow, …
We introduce a structured light technique called Micro Phase Shifting, which overcomes these problems. The key idea is to project sinusoidal patterns with frequencies limited to a narrow, …