Surface reconstruction from computed tomography (CT) image of human head with the effect of noise

Halim, Suhaila Abd; Halim, Muhammad Syawal Abd; Afrouzi, Hadi Nabipour

doi:10.1063/1.5054216

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Those 2D slices are stacked and finally reconstructed into a 3D model with visible inner structure 100 . X-ray CT provides abundant information of the porosity in LPBF printed metals, including spatial distribution, morphology, dimensions and volumes, and other quantitative data 102 . Figure 5 demonstrates representative views of porosity distribution and a pore detected by CT. X-ray CT method has received intense interest from the academia.…”

Section: The Archimedes Methodsmentioning

confidence: 99%

A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion

Wang¹,

Han²,

Sa³

et al. 2022

OEA

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Additive manufacturing (AM), or 3D printing, is an emerging technology that "adds" materials up and constructs products through a layer-by-layer procedure. Laser powder bed fusion (LPBF) is a powder-bed-based AM technology that can fabricate a large variety of metallic materials with excellent quality and accuracy. However, various defects such as porosity, cracks, and incursions can be generated during the printing process. As the most universal and a near-inevitable defect, porosity plays a substantial role in determining the mechanical performance of as-printed products. This work presents a comprehensive review of literatures that focused on the porosity in LPBF printed metals. The formation mechanisms, evaluation methods, effects on mechanical performance with corresponding models, and controlling methods of porosity have been illustrated and discussed in-depth. Achievements in four representative metals, namely Ti−6Al−4V, 316L, Inconel 718, and AlSi10Mg, have been critically reviewed with a statistical analysis on the correlation between porosity fraction and tensile properties. Ductility has been determined as the most sensitive property to porosity among several key tensile properties. This review also provides potential directions and opportunities to address the current porosity-related challenges.

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Section: The Archimedes Methodsmentioning

confidence: 99%

A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion

Wang¹,

Han²,

Sa³

et al. 2022

OEA

View full text Add to dashboard Cite

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Segmentation and Features Extraction of Malaysian Herbs Leaves

Halim

Afrouzi

Lazim

2021

J. Phys.: Conf. Ser.

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In modern medical practice, herbs play a very important role as the source of bio-technology. Therefore, providing a database containing information of these herbs is significant to assist the medicinal practitioners and users. Image recognition, a process that includes image segmentation, features extraction and classification, is one of the methods to develop the database for herbs. This paper focuses on image segmentation and features extraction of 125 images with 1616×1080 pixels of Malaysian Herb Leaves including Sirih, Mexican Mint, Rerama, Belalai Gajah and Senduduk. The images were first segmented using Sobel operator to get the boundary points. Then, 7 geometrical features and 7 textural features were extracted for each image including area, perimeter, major axis length, minor axis length, roundness, smoothness and flatness. The experimental results were obtained using MATLAB R2018a. The results show that Sobel can successfully segment the images and calculates the features of the herb leaves.

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3-Dimensional Human Head Reconstruction Using Cubic Spline Surface on CPU-GPU Platform

Afrouzi

Alias

2019

Proceedings of the 2019 4th International Conference on Intelligent Information Technology

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Surface reconstruction from computed tomography (CT) image of human head with the effect of noise

Cited by 3 publications

References 6 publications

A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion

A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion

Segmentation and Features Extraction of Malaysian Herbs Leaves

3-Dimensional Human Head Reconstruction Using Cubic Spline Surface on CPU-GPU Platform

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