scholarly journals A versatile, low-cost, snapshot multidimensional imaging approach based on structured light

2020 ◽  
Vol 28 (7) ◽  
pp. 9572 ◽  
Author(s):  
Karolina Dorozynska ◽  
Vassily Kornienko ◽  
Marcus Aldén ◽  
Elias Kristensson
Keyword(s):  
Low Cost ◽  
Structured Light ◽  
Imaging Approach ◽  
Multidimensional Imaging

An easy and low-cost biomagnetic methodology to study regional gastrointestinal transit in rats

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Leonardo Pinto ◽  
Guilherme Soares ◽  
André Próspero ◽  
Erick Stoppa ◽  
Gabriel Biasotti ◽  
...  
Keyword(s):  
Low Cost ◽  
Gastrointestinal Transit ◽  
Alternate Current ◽  
Phenol Red ◽  
Distal Small Intestine ◽  
Reliable Assessment ◽  
Imaging Approach ◽  
Magnetic Tracer ◽  
Tracer Distribution ◽  
Gi Transit

Abstract The identification of gastrointestinal (GI) motility disorders requires the evaluation of regional GI transit, and the development of alternative methodologies in animals has a significant impact on translational approaches. Therefore, the purpose of this study was to validate an easy and low-cost methodology (alternate current biosusceptometry – ACB) for the assessment of regional GI transit in rats through images. Rats were fed a test meal containing magnetic tracer and phenol red, and GI segments (stomach, proximal, medial and distal small intestine, and cecum) were collected to assess tracer’s retention at distinct times after ingestion (0, 60, 120, 240, and 360 min). Images were obtained by scanning the segments, and phenol red concentration was determined by the sample’s absorbance. The temporal retention profile, geometric center, gastric emptying, and cecum arrival were evaluated. The correlation coefficient between methods was 0.802, and the temporal retention of each segment was successfully assessed. GI parameters yielded comparable results between methods, and ACB images presented advantages as the possibility to visualize intrasegmental tracer distribution and the automated scan of the segments. The imaging approach provided a reliable assessment of several parameters simultaneously and may serve as an accurate and sensitive approach for regional GI research in rats.

scholarly journals Structured-Light Based 3D Reconstruction System for Cultural Relic Packaging

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2981 ◽  
Author(s):  
Limei Song ◽  
Xinyao Li ◽  
Yan-gang Yang ◽  
Xinjun Zhu ◽  
Qinghua Guo ◽  
...  
Keyword(s):  
3D Reconstruction ◽  
High Efficiency ◽  
Low Cost ◽  
Structured Light ◽  
Three Dimensional ◽  
Cloud Data ◽  
Dimensional Measurement ◽  
Cost System ◽  
Three Dimensional Measurement ◽  
Cultural Relics

The non-contact three-dimensional measurement and reconstruction techniques have played a significant role in the packaging and transportation of precious cultural relics. This paper develops a structured light based three-dimensional measurement system, with a low-cost for cultural relics packaging. The structured light based system performs rapid measurements and generates 3D point cloud data, which is then denoised, registered and merged to achieve accurate 3D reconstruction for cultural relics. The multi-frequency heterodyne method and the method in this paper are compared. It is shown that the relative accuracy of the proposed low-cost system can reach a level of 1/1000. The high efficiency of the system is demonstrated through experimental results.

scholarly journals PRECISION AND ACCURACY PARAMETERS IN STRUCTURED LIGHT 3-D SCANNING

2016 ◽  
Vol XL-5/W8 ◽  
pp. 7-15 ◽  
Author(s):  
E. R. Eiríksson ◽  
J. Wilm ◽  
D. B. Pedersen ◽  
H. Aanæs
Keyword(s):  
State Of The Art ◽  
Low Cost ◽  
Structured Light ◽  
Quantitative Measure ◽  
Calibration Procedure ◽  
Design Parameters ◽  
Precision And Accuracy ◽  
Structured Light Systems ◽  
Encoding Strategy ◽  
Cost Components

Structured light systems are popular in part because they can be constructed from off-the-shelf low cost components. In this paper we quantitatively show how common design parameters affect precision and accuracy in such systems, supplying a much needed guide for practitioners. Our quantitative measure is the established VDI/VDE 2634 (Part 2) guideline using precision made calibration artifacts. Experiments are performed on our own structured light setup, consisting of two cameras and a projector. We place our focus on the influence of calibration design parameters, the calibration procedure and encoding strategy and present our findings. Finally, we compare our setup to a state of the art metrology grade commercial scanner. Our results show that comparable, and in some cases better, results can be obtained using the parameter settings determined in this study.

scholarly journals Application of a Novel Low-Cost Hyperspectral Imaging Setup Operating in the Mid-Infrared Region

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 800 ◽  
Author(s):  
Jakob Kilgus ◽  
Robert Zimmerleiter ◽  
Kristina Duswald ◽  
Florian Hinterleitner ◽  
Gregor Langer ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Low Cost ◽  
Infrared Region ◽  
Spatially Resolved ◽  
Spectral Identification ◽  
Fabry Perot ◽  
Imaging Approach ◽  
Reflection Geometry ◽  
Fingerprint Region ◽  
Working Distance

In this contribution, we demonstrate the realization and application of a low-cost, flexible, small and fast hyperspectral imaging approach operating in the midinfrared fingerprint region where most molecules exhibit their fundamental vibrations. Following this approach, the recording of chemical images of macroscopic-sized samples at standoff distances in reflection geometry is possible. The optical setup is based on spectral identification by means of a MEMS-based Fabry-Pérot interferometer combined with 2D-snapshot spatial resolution using a bolometer camera. Results show the successful spatially resolved (resolution below 500 µm) chemical identification of different samples deposited on a metal surface (FOV = 6 × 5 cm) at a working distance of 35 cm.

Efficient Measurement of Key-Cap Flatness for Computer Keyboards With a Multi-Line Structured Light Imaging Approach

2019 ◽  
Vol 19 (21) ◽  
pp. 10087-10098 ◽  
Author(s):  
Huisi Miao ◽  
Changyan Xiao ◽  
Min Wei ◽  
Yucheng Li
Keyword(s):  
Structured Light ◽  
Imaging Approach ◽  
Efficient Measurement

High Accuracy and Low Cost 3D Surface Acquisition Using Structured Light

2013 ◽  
Vol 5 (9) ◽  
pp. 1191-1201
Author(s):  
Ma Jie ◽  
Liu Xinyan ◽  
Zhang Xiaomei ◽  
Zhang Zhiwei ◽  
Zhao Quanming
Keyword(s):  
Low Cost ◽  
Structured Light ◽  
High Accuracy ◽  
3D Surface
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