Improved Minimum Distance Discrimination Method Used in Image Analysis of Fabric Wear Resistance

2012 ◽  
Vol 263-266 ◽  
pp. 421-426 ◽  
Author(s):  
Jian Xia Su ◽  
Run Ping Han ◽  
Li Min Shi ◽  
Xing He Qian
Keyword(s):  
Image Processing ◽  
Wear Resistance ◽  
Minimum Distance ◽  
Standard Sample ◽  
Resistance Level ◽  
Image Preprocessing ◽  
Maximum Area ◽  
Hair Bulb ◽  
Distance Discrimination ◽  
Discrimination Method

With the increasing attention of textile, the wear resistance of the fabric is more and more important today. The wear resistance is judged by the sample and standard sample according to sensory contrast complete, but this approach has repeated poor consistency. The subjective factors of testers influence the result heavily. So the powerful image processing tools of MATLAB was used in the analysis of fabrics image processing. By image read, display and interception, image preprocessing, and feature extraction value, the eigenvalues of total area of the hair bulb, maximum area of the hair bulb, and hair bulb number were obtained. After the improved minimum distance discrimination method was used to determine the level of wear resistance by computer. Tests show that fabrics wear resistance level can be judged quickly, accurately and automatically.

Structure and Properties of Coatings Obtained by Electron-Beam Cladding of Ti+C and Ti+B4C Powder Mixtures on Steel Specimens at Air Atmosphere

2014 ◽  
Vol 1040 ◽  
pp. 778-783 ◽  
Author(s):  
Daria Mul ◽  
Dina S. Krivezhenko ◽  
Daria B. Lazurenko ◽  
Olga G. Lenivtseva ◽  
Alexandra Chevakinskaya
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Heterogeneous Structure ◽  
X Ray Diffraction ◽  
Properties Of Coatings ◽  
Resistance Level ◽  
Powder Mixtures ◽  
Abrasive Particles ◽  
Air Atmosphere ◽  
To Receive

The surface layer of steel was reinforced by electron-beam cladding at air atmosphere. Two types of powder mixtures were used to receive coatings: (1) titanium and graphite, (2) titanium and boron carbide. The formation of heterogeneous structure was observed in specimens after the electron-beam treatment by the methods of optical microscopy and scanning electron microscopy. The X-ray diffraction analysis was used to analyze the phase composition of the coatings. The wear resistance level of the coatings was estimated by friction test against loosely fixed abrasive particles. It was found that surface alloying of steel with carbon containing components led to the formation of material with an enhanced wear resistance level.

Fingerprint Preprocessing and Recognition System Development and Design

2014 ◽  
Vol 971-973 ◽  
pp. 1897-1900
Author(s):  
Qian Wu
Keyword(s):  
Image Processing ◽  
System Development ◽  
Recognition System ◽  
Identity Authentication ◽  
Fingerprint Identification ◽  
Fingerprint Image ◽  
Image Preprocessing ◽  
The Core ◽  
Core Technology ◽  
Theoretical Significance

fingerprint image preprocessing and is one of the branch of image processing and pattern recognition, after several years of development the increasing maturity of the technology. Due to the uniqueness and invariability of fingerprints, and the feasibility and practicability of the fingerprint identification technology, fingerprint identification has become the most popular, the most convenient, one of the most reliable personal identity authentication technology. Although on this technology has a variety of molding products, but because many of the core technology by commercial interests and confidentiality need without open, as well as the development of the society put forward higher requirements on the performance of the system, so in this field of research, still has important theoretical significance and practical value.

Detection System about Train Brake Discs' Cracks Based on Image Processing

2014 ◽  
Vol 513-517 ◽  
pp. 2831-2834
Author(s):  
Gui Ming Shi ◽  
Meng Lv ◽  
Chang Liu ◽  
Qing Tao Wei
Keyword(s):  
Image Processing ◽  
Detection System ◽  
Crack Size ◽  
Brake Disc ◽  
Pixel Size ◽  
Image Preprocessing ◽  
Running Safety ◽  
Factors Influencing ◽  
Brake Discs ◽  
Main Factors

The reliability of the brake disc is one of the main factors influencing running safety. This paper introduces the causes and harm of train brake disc crack, the application of digital image acquisition technology, and image processing function in MATLAB. We research a method of image preprocessing and subsequent processing by programming language, give effect drawing in each phase, and calculate the pixel size through effective extraction based on the crack characteristics. At last the condition of crack size and actual area is presented. The study can provide a reference for monitoring personnel replace the brake disc timely.

Study on Error Analysis of On-Line Measurement System Based Numerical Control Process

2013 ◽  
Vol 454 ◽  
pp. 102-105
Author(s):  
Hai Dong Ren ◽  
Er Bao Peng
Keyword(s):  
Image Processing ◽  
Error Analysis ◽  
Measurement System ◽  
Control Process ◽  
Numerical Control ◽  
Error Source ◽  
Image Preprocessing ◽  
Geometrical Error ◽  
Line Measurement ◽  
On Line

The error analysis of the on-line measurement system used in the processing parts of numerically-controlled machine is investigated, and the image processing technilogy is analyzed through the investigations on error source, error analysis and geometrical error analysis, in which, much consideraton is paid to the image treatment and the object margin extracting process conducted to the images segmented and disposed in terms of image preprocessing and segmentation. Therefore, such an investigation is of great importance to enhance the machining precision of parts.

scholarly journals ANALYSE THE RISK FACTORS OF CORONARY HEART DISEASE IN YOUNG AND MIDDLE – AGED MALE PATIENTS USING MULTIVARIATE STATISTICAL

2021 ◽  
pp. 14
Author(s):  
Keyword(s):  
Risk Factors ◽  
Coronary Heart Disease ◽  
Heart Disease ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Mahalanobis Distance ◽  
Vulnerable Plaque ◽  
Male Patients ◽  
Distance Discrimination ◽  
Discrimination Method

Objective: To study the correlation between various risk factors and coronary CTA calcification score ( CACS ) in young and middle-aged male patients with coronary heart disease by multiple linear regression, and to predict plaque properties by Mahalanobis distance discrimination method. This study provides evidence for early clinical evaluation of the extent of coronary artery calcification and the property of plaque in patients having suffered coronary heart disease. Methods: choose 98 male patients under 55 years old with coronary heart disease randomly and collecte relevant medical history data and test results while in hospital.Utilizing the theory of multiple linear regression and Mahalanobis distance discriminant to analyse these dates. Results: Factors including hypertension classification×years, number of cigarettes smoked(packs / week )×years,and time of diabetes(years) have a positive correlation between CACS respectively. Comparing calcified plaque and vulnerable plaque, mixed plaque and vulnerable plaque,there is a significant differences ( p < 0.01) while hs-CRP and IL-6 are as the indicator. Mahalanobis distance discrimination method has a discrimination accuracy of 91.83 % for the group wrih susceptible factors only. Conclusion: The model of predicting the extent of coronary artery calcification by multiple linear regression has high reliability. Vulnerable plaques can be distinguished from plaques of other properties efficiently using Mahalanobis distance discrimination method.

scholarly journals Quantitative Identification Cracks of Heritage Rock Based on Digital Image Technology

2022 ◽  
Vol 2148 (1) ◽  
pp. 012048
Author(s):  
Xiufang Wang ◽  
Jingyuan Li ◽  
Ming Bai ◽  
Yan Pei
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Rock Fractures ◽  
Processing Technologies ◽  
Image Preprocessing ◽  
Morphological Filtering ◽  
Fracture Area ◽  
Quantitative Identification ◽  
Restoration And Protection

Abstract Digital image processing technologies are used to extract and evaluate the cracks of heritage rock in this paper. Firstly, the image needs to go through a series of image preprocessing operations such as graying, enhancement, filtering and binaryzation to filter out a large part of the noise. Then, in order to achieve the requirements of accurately extracting the crack area, the image is again divided into the crack area and morphological filtering. After evaluation, the obtained fracture area can provide data support for the restoration and protection of heritage rock. In this paper, the cracks of heritage rock are extracted in three different locations.The results show that the three groups of rock fractures have different effects on the rocks, but they all need to be repaired to maintain the appearance of the heritage rock.

Experimental Study of Human Fingerprint Image Recognition Analysis

2014 ◽  
Vol 971-973 ◽  
pp. 1616-1619
Author(s):  
Su Ling Zhang
Keyword(s):  
Image Processing ◽  
Experimental Study ◽  
Image Segmentation ◽  
Image Enhancement ◽  
Image Recognition ◽  
Fingerprint Image ◽  
Image Preprocessing ◽  
Advantages And Disadvantages ◽  
Demand Pattern ◽  
Image Segmentation Algorithm

respectively cited the fingerprint image preprocessing for image segmentation , demand pattern, image enhancement and binarization of several algorithms , and each algorithm were compared. Image segmentation algorithm studied in this paper , image enhancement algorithms, can be very good to complete the project requirements. Because each method has its advantages and disadvantages , and therefore use different methods to get different results after image processing .

Structure and Properties of Surface Layers Obtained by Atmospheric Electron Beam Cladding of Graphite-Titanium Powder Mixture onto Titanium Substrate

2014 ◽  
Vol 1040 ◽  
pp. 784-789 ◽  
Author(s):  
Olga G. Lenivtseva ◽  
Evgeniy Golovin ◽  
Vitaliy V. Samoylenko ◽  
Daria Mul ◽  
Dmitriy Golovin
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Titanium Substrate ◽  
High Strength ◽  
Hardened Layer ◽  
Beam Current ◽  
Layer Growth ◽  
Electron Beam Current ◽  
Surface Layers ◽  
Resistance Level

The cladding of titanium and graphite powders on the cp-titanium workpieces using the electron beam injected to the atmosphere provided the formation of the surface layers with a high content of high-strength carbide particles. The main structural components in cladded layers are α-Ti (αʹ-Ti), titanium carbide and graphite. Electron beam current is the main technological parameter defining a thickness of the hardened layer. An increasing beam current ranged from 20 to 23 mA leads to the cladded layer growth up to 2.9 mm. However, in this case a significant decrease of the microhardness level and the wear resistance level of the cladded layer is not observed. An average microhardess value of the hardened layer is of 430 HV. Under the conditions of friction against fixed abrasive particles, a wear resistance level of the cladded layers is by 32-45 % larger than that of cp-titanium.

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