A Raspberry Pi Based Portable Endoscopic 3D Measurement System

Schlobohm, Jochen; Posch, Andreas E.; Reithmeier, Eduard

doi:10.3390/electronics5030043

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…PiCam boards were chosen here due to the ease of data acquisition and image processing using Raspberry Pi computer boards (Raspberry Pi Foundation), via the Python programming language. Due to their low expense and power consumption, Raspberry Pi computers are increasingly being used in a variety of sensing applications (e.g., [9,10]). Whilst this work is focused on one sensor type, preliminary tests with another such back-illuminated CMOS device, the Sony IMX219 (Sony Corporation, Minato, Tokyo, Japan), also evidence UV sensitivity.…”

Section: Uv Camera Developmentmentioning

confidence: 99%

Ultraviolet Imaging with Low Cost Smartphone Sensors: Development and Application of a Raspberry Pi-Based UV Camera

Wilkes

McGonigle

Pering

et al. 2016

Sensors

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Here, we report, for what we believe to be the first time, on the modification of a low cost sensor, designed for the smartphone camera market, to develop an ultraviolet (UV) camera system. This was achieved via adaptation of Raspberry Pi cameras, which are based on back-illuminated complementary metal-oxide semiconductor (CMOS) sensors, and we demonstrated the utility of these devices for applications at wavelengths as low as 310 nm, by remotely sensing power station smokestack emissions in this spectral region. Given the very low cost of these units, ≈ USD 25, they are suitable for widespread proliferation in a variety of UV imaging applications, e.g., in atmospheric science, volcanology, forensics and surface smoothness measurements.

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Section: Uv Camera Developmentmentioning

confidence: 99%

Ultraviolet Imaging with Low Cost Smartphone Sensors: Development and Application of a Raspberry Pi-Based UV Camera

Wilkes

McGonigle

Pering

et al. 2016

Sensors

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“…where Equations ( 4) and (5) show that the 3D coordinates of point P with respect to the transmitter coordinate system are denoted as E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 6 ; 1 1 6 ; 2 9 0…”

Section: Electromagnetic-based Stereo Imaging Methodsmentioning

confidence: 99%

“…To this end, certain medicalapplication-oriented 3D endoscopic measurement systems have been developed. 5,6 These systems are based on fringe projection and monocular endoscope. However, the measurement of multiple pattern projections in a limited space is challenging due to scattering caused by surface roughness and surface curvature has a significant impact on the phase contrast of interference fringe patterns.…”

Section: Introductionmentioning

confidence: 99%

Development of an ultracompact endoscopic three-dimensional scanner with flexible imaging fiber optics

et al. 2021

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We developed an ultracompact three-dimensional (3D) endoscopic scanner that utilizes an electromagnetic-based stereo imaging method (EBSIM) for shape measurements. The method was used to investigate the applicability of imaging fiber optics to featureless surface profiles in confined spaces. The EBSIM is combined with a coherent flexible fiber bundle for structured light pattern projection to ensure that the scanner head can achieve a final diameter of merely 3.4 mm and a baseline length of 1.4 mm. Compared with the existing methods, the scanner is designed to have a minimum focal distance of 2 mm to address the intraoperative evaluation problem. System registration and complex calibration are unnecessary before measurements, and the scanner can be operated from any position and orientation. The scanner is capable of acquiring 3D videos at 30 frames per second. The experimental results demonstrate the feasibility of using the EBSIM for 3D surface profile measurements of featureless cylindrical surfaces. A prototype scanner is presented in extensor, and the average error of a series of known depth distances is found to be equal to 0.15 mm. The implementation shows that the 3D scanner can be potentially applied for endoscopic inspections and intraoperative evaluations in minimally invasive surgeries.

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“…The Raspberry Pi is a powerful prototyping platform, and many of the articles in this Special Issue are constructing prototypes [6,11,[17][18][19].The idea of a prototype implies a partial implementation of all the desired features, but there is often a need to build a fully functional prototype [12,22].…”

Section: Pi the Prototypementioning

confidence: 99%

“…The Internet of Things encompasses all aspects of the digital world and the interaction with physical systems, for example art [16], industrial [17], medical research [18] and automotive applications [19].…”

Section: Special Issue On Raspberry Pi Technologymentioning

confidence: 99%