Recognition of Blurring Alphabet Character on Timing Pulley Drawing Based on Halcon Image Processing Technology

In order to solve the problem of Inefficiency in the use of manual detection of the information on the engineering drawings in synchronous belt manufacturers. This paper present a method of image processing based on HALCON. Firstly, the image will be inputted to the software platform, then the image will be processing by the means of Image enhancement, threshold segmentation and so on. Thus, the information on the engineering drawings can be recognized. This experience shows that blurring alphabet character on the engineering drawings can be recognized quickly and accurately based on Halcon. It can effectively reduce the workload, increasing the productivity.

Representative Construction Engineering Drawings Combining SLAM and Ground-Based LiDAR

Obtaining architectural engineering drawings is a crucial aspect of upgrading and repairing structures. Traditional elevation measuring is ineffective and results in a poor rate of restoration. The current building elevation measurement solutions based on 3D scanning technology all obtain building 3D point cloud data from a single type of laser scanner. These two methods can’t get both indoor and outdoor scenes at the same time. This paper presents a scanning strategy that combines SLAM with Ground-based LiDAR to solve this problem. The point cloud data for the building’s indoor and outdoor scenes are obtained independently, and the Ground-based LiDAR point cloud data is registered locally using the iterative closest point(ICP) algorithm. The SLAM point clouds and the Ground-based LiDAR point clouds are then registered as a whole to develop an overall model of the building using point constrained error equations. For various reasons, the building can be trimmed into a planar point cloud model depending on the application. Finally, engineering drawings for the construction of the building can be drawn. The method’s viability was demonstrated by using it in a 3D scanning project of a scenic site in Beijing. This technology improves model information interpretability, scanning efficiency, and provides powerful data assistance for building rehabilitation and repair. It is extremely important in the disciplines of urban planning, rehabilitation, and historic preservation. After performing a more optimal preprocessing, more than 90% classification accuracy was achieved across 18 low-power consumer devices for scenarios in which the in-band features-to-noise ratio (FNR) was very poor.

Application of 3D Modeling Technology in Engineering Graphics

With the development of technology and the progress of the times, the application methods and expression methods (including teaching methods) of engineering drawings have undergone tremendous changes. This article analyzes the reasons that restrict the three-dimensional design method can not completely replace the two-dimensional drawing in the short term, and proposes the teaching reform direction that combines the three-dimensional modeling with the traditional graphics content. It clarifies the role of 3D modeling content in graphics courses at this stage, and explains the specific methods of introducing 3D modeling in different stages of graphics courses and the choice of teaching software.

PENGARUH YOUTUBE TERHADAP HASIL BELAJAR SISWA KELAS X PADA MATA PELAJARAN TEKNIK KERJA BENGKEL DAN GAMBAR TEKNIK DI SMKN 3 SELONG LOMBOK TIMUR

This research aims to find out how students learn on workshop engineering lessons and engineering drawings in class X audio video SMKN 3 Selong, by using youtube as a medium in learning. The purpose of research is to find out whether there is a good and increased influence by using youtube-based learning media with convensional learning on student learning outcomes. The learning process by using youtube can make students' learning outcomes higher compared to the conventional learning process in workshop engineering subjects and engineering images in class X audio video. In the experimental class with youtube as a medium of learning, the pretest score was 58.68 and the posttest score about of 83.65 and in the control class with the conventional model the average pretest was 54.28 and the average posttest score was 72.21. Based on the data, there was a significant improvement in students' learning outcomes by using youtube as a learning medium. ABSTRAKPenelitian ini bertujuan untuk mengetahui bagaimana hasil dari belajar siswa pada pelajaran teknik kerja bengkel dan gambar teknik pada kelas X audio video SMKN 3 Selong, yaitu menggunakan youtube sebagai media dalam belajar. maksud dari penelitian adalah mengetahui Apakah ada pengaruh yang baik dan meningkat dengan menggunakan media pembelajaran berbasis youtube dengan pembelajaran secara Convensional terhadap hasil belajar siswa. Jenis penelitian ini merupakan penelitian kuantitatif, melalui metode eksperimen dengan satu kelas control dan satu kelas eksperimen. Proses pembelajaran dengan menggunakan youtube dapat membuat hasil belajar siswa menjadi lebih tinggi dibandingkan dengan proses pembelajaran dengan konvensional pada mata pelajaran teknik bengkel dan gambar teknik di kelas X teknik audio video. Pada kelas eksperiment dengan youtube sebagai media pembelajarannya, nilai pretest 58,68 dan nilai posttest memiliki rata-rata 83,65 dan pada kelas kontrol dengan model konvensional nilai pretest rata-rata 54,28 dan nilai posttest berada pada rata-rata 72,21. Berdasarkan dari data tersebut terlihat peningkatan yang signifikan terhadap hasil belajar siswa dengan menggunakan youtube sebagai media pembelajaran.

Automotive Engineering Drawing Learning: Effective Online Learning Using Autocad Application

This study aims to analyze the effect of using autocad software to improve students' online learning outcomes of automotive engineering drawings. This quasi-experimental study used a pretest-posttest design and a control group. All class X students of the engineering and motorcycle business expertise program in two vocational schools became the population in this study. The sample used in this study amounted to 112 students who were divided into 4 classes in two vocational schools. The data collection technique was carried out using tests with multiple choice objective test instruments and drawing worksheets. The collected data were analyzed using descriptive statistics and inferential statistics with t test. The results of the t test obtained tcount = 9.703 with ttable at a significance level of 5% = 1.986. These results show the value of tcount> ttable, so that it accepts Ha and rejects H0. Thus it is concluded that the use of autocad software in online learning automotive engineering drawings has a significant effect on improving student online learning outcomes.

Characterization of High-Rise Reinforced Concrete Buildings Located in Antofagasta, Chile, by Means of Structural Indexes

This study aims to characterize a series of high-rise reinforced concrete wall buildings located in Antofagasta, Chile, by means of a set of structural indexes commonly used in professional activities in our country and recommended by researchers. To this effect, a total of eight buildings was analyzed, from which, based on their architectural plans and engineering drawings, a series of properties was determined, such as wall and floor area, among others. Additionally, a modal spectral analysis was carried out according to the current Chilean regulations (NCh 433Of.1996Mod.2009 and DS 61) by means of the ETABS software. Next, eleven structural indexes were selected and determined, which are related to stiffness, structural redundancy, and ductility, with the purpose of making a seismic qualification. The obtained values indexes provide information about the expected structural performance of the buildings under a major seismic event. Finally, correlations between the different indexes were established.

A Novel Threshold Changeable Secret Image Sharing Scheme

In secret image sharing, the image is divided into several stego images, which are managed by corresponding participants. The secret image can be recovered only when the number of authorized participants is no less than the threshold. Thus, it is widely used to protect essential images, such as engineering drawings and product design drawings. In the traditional secret image sharing scheme, the threshold is fixed and unique. However, in practice, the security policy and the adversarial structure may change; therefore, the threshold must be adjusted dynamically. In this paper, we propose a novel secret image sharing scheme with a changeable threshold capability. Our scheme eliminates the limit of the changeable threshold and reduces the computation required. Also, our scheme is the first threshold changeable secret image sharing scheme that can recover an undistorted cover image. The theoretical analysis shows that our scheme is safe even if the threshold is changed. The experiments demonstrated that the stego image generated by our algorithm has better quality than other changeable-threshold, secret image sharing algorithms.