Research on the Accuracy and Speed of Three-Dimensional Reconstruction of Liver Surface Based on Binocular Structured Light

Zhang, Xin; Chen, Long; Zhang, Fengfeng; Sun, Lining

doi:10.1109/access.2020.3048953

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…The x and y axes are parallel to the u and v axes. d x and d y are the physical distances between pixels in the camera [48]. The coordinate and matrix equations are as follows:…”

Section: Calculation Circle Model For Wheel Diametermentioning

confidence: 99%

Rapid measurement method for key dimensions of train wheelset based on improved image processing algorithm

Fang,

Wang,

Zhu

et al. 2024

Meas. Sci. Technol.

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The key dimensions of train wheelsets change with the increase of running time. To ensure the safe operation of the train, the key dimensions should meet the relevant technical requirements. Maintenance of wheelsets and measurement of key dimensions are important part of the daily maintenance work. A rapid measurement method for key dimensions of hand-held wheelsets integrating multiple parameter measurements is studied. The general framework of the system is examined and the roles of the modules are described. A rapid measurement algorithm for key dimensions of wheelsets based on image processing algorithms is studied. The optical center for the initial position of the continuous line spot is searched. The continuous line spot center extraction algorithm during tread measurement is optimized. A three-dimensional model is reconstructed using point cloud data, then key dimensions are measured and calculated from the model. In order to verify the feasibility of the method, traditional measurement methods are used for comparison tests. The results show that the method is effective in the daily maintenance of trains.

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“…The x and y axes are parallel to the u and v axes. d x and d y are the physical distances between pixels in the camera [48]. The coordinate and matrix equations are as follows:…”

Section: Calculation Circle Model For Wheel Diametermentioning

confidence: 99%

Rapid measurement method for key dimensions of train wheelset based on improved image processing algorithm

Fang,

Wang,

Zhu

et al. 2024

Meas. Sci. Technol.

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show abstract

“…It is not suitable for measuring large-sized objects [26]. On the other hand, surface structured photometry utilizes a projector to project patterns, allowing for the acquisition of more depth information of the object surface in a single projection without the need for multiple scans [27]. This enables surface structured light to quickly obtain the full 3D structure information of the tested object.…”

Section: Introductionmentioning

confidence: 99%

Study on the Measurement Method of Wheat Volume Based on Binocular Structured Light

Zhao,

Chang,

2023

Sustainability

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In this paper, we propose a grain volume measurement method based on binocular structured light to address the need for fast and high-precision grain volume measurement in grain stocks. Firstly, we utilize speckle structured light imaging to tackle the image matching problem caused by non-uniform illumination in the grain depot environment and the similar texture of the grain pile surface. Secondly, we employ a semi-global stereo matching algorithm with census transformation to obtain disparity maps in grain bins, which are then converted into depth maps using the triangulation principle. Subsequently, each pixel in the depth map is transformed from camera coordinates to world coordinates using the internal and external parameter information of the camera. This allows us to construct 3D cloud data of the grain pile, including the grain warehouse scene. Thirdly, the improved European clustering method is used to achieve the segmentation of the three-dimensional point cloud data of the grain pile and the scene of the grain depot, and the pass-through filtering method is used to eliminate some outliers and poor segmentation points generated by segmentation to obtain more accurate three-dimensional point cloud data of the grain pile. Finally, the improved Delaunay triangulation method was used to construct the optimal topology of the grain surface continuous triangular mesh, and the nodes of the grain surface triangular mesh were projected vertically to the bottom of the grain warehouse to form several irregular triangular prisms; then, the cut and complement method was used to convert these non-plane triangular prisms into regular triangular prisms that could directly calculate the volume. The measured volume of the pile is then obtained by calculating the volume of the triangular prism. The experimental results indicate that the measured volume has a relative error of less than 1.5% and an average relative error of less than 0.5%. By selecting an appropriate threshold, the relative standard deviation can be maintained within 0.6%. The test results obtained from the laboratory test platform meet the requirements for field inspection of the granary.

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Detection and 3-D Visualization of Human Tooth Surface Cracks Using Line Structured Light

Chen,

He,

et al. 2024

IEEE Sensors J.

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Research on the Accuracy and Speed of Three-Dimensional Reconstruction of Liver Surface Based on Binocular Structured Light

Cited by 6 publications

References 39 publications

Rapid measurement method for key dimensions of train wheelset based on improved image processing algorithm

Rapid measurement method for key dimensions of train wheelset based on improved image processing algorithm

Study on the Measurement Method of Wheat Volume Based on Binocular Structured Light

Detection and 3-D Visualization of Human Tooth Surface Cracks Using Line Structured Light

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