Results 171 to 180 of about 37,120 (199)

Identification of surface leather defects

Proceedings of the 4th international conference conference on Computer systems and technologies e-Learning - CompSysTech '03, 2003
In this paper is discussing application of χ2 - criteria for analysis of leathers based on image histograms. It is proposed a manner determining standard histograms and basic evaluation, It is designed an algorithm of leather defects identification for surfaces analysis.
Lidiya Georgieva, Kaloyan Krastev, Nikola Angelov   +2 more
openaire   +1 more source

Attributes Reduction Applied to Leather Defects Classification

2010 23rd SIBGRAPI Conference on Graphics, Patterns and Images, 2010
This paper presents a study on attributes reduction, comparing five discriminant analysis techniques: FisherFace, CLDA, DLDA, YLDA and KLDA. Attributes reduction has been applied to the problem of leather defect classification using four different classifiers: C4.5, kNN, Na\"{i}ve Bayes and Support Vector Machines. The results of several experiments on
W P Amorim, H Pistori, M C Pereira, M A C Jacinto   +3 more
openaire   +1 more source

Detection and localization of defects on natural leather surfaces

Journal of Ambient Intelligence and Humanized Computing, 2021
Defects that appear on a leather surface may be the result of natural variations or poor handling during the manufacturing process. Visual inspection in the factory is one of the essential steps in the process of quality assurance. It should be done before the finished products are being dispatched to the customer.
Y. S. Gan, Sze-Teng Liong, Danna Zheng, Yiyang Xia, Shuli Wu, Mengchen Lin, Yen-Chang Huang   +6 more
openaire   +1 more source

Defect detection on leather by oriented singularities

1997
This paper presents a system for leather inspection based upon visual textural properties of the material surface. Defects are isolated from the complex and not homogeneous background by analyzing their strongly oriented structure. The patterns to be analyzed are represented in an appropriate parameter space using an optimization approach: in this way ...
A. Branca, F. P. Lovergine, G. Attolico, A. Distante   +3 more
openaire   +1 more source

Automated defect inspection and classification of leather fabric

Intelligent Data Analysis, 2001
This paper describes an automated vision system for detecting and classifying surface defects on leather fabric. In the defect inspection process, visual defects are located and reported through a two-step segmentation procedure based on thresholding and morphological processing.
Kwak, Choonjong, Ventura, José A., Tofang-Sazi, Karim   +2 more
openaire   +1 more source

Leather defect classification and segmentation using deep learning architecture

International Journal of Computer Integrated Manufacturing, 2020
The defects on a leather surface may be caused by the poor material handling process during the production and manufacturing stages.
Sze-Teng Liong, Danna Zheng, Yen-Chang Huang, Y. S. Gan   +3 more
openaire   +1 more source

Leather features selection for defects' recognition using fuzzy logic

Proceedings of the 5th international conference on Computer systems and technologies - CompSysTech '04, 2004
In the present work are investigated 12 histogram and statistical features for analysis of leather surface images. A research of the features suitability for surface defects detection is done. For the image analysis was used the quadtree decomposition method - a technique that partitions an image into homogeneous blocks.
Kaloyan Krastev, Lidia Georgieva, Nikola Angelov   +2 more
openaire   +1 more source

The effect of ‘natural’ defects on leather dyeing

Journal of the Society of Dyers and Colourists, 1994
Dyeing leather is very different from dyeing textiles, not least because of the defects that are frequently present on the skins. Axel Landmann looks at the many defects that can occur, and how they affect the dyeing process.
openaire   +1 more source

A reference standard of defect compensation for leather transactions

The International Journal of Advanced Manufacturing Technology, 2004
Defects exist on natural leather surfaces and they usually cannot be eliminated during processing. No international criterion specifies the compensatory counting for calf leather surface defects. So complicated negotiation causes additional cost and argument between suppliers and purchasers.
C. Yeh, D.-B. Perng
openaire   +1 more source

Leather Defect Classification in Footwear Manufacturing Industries

Leather is a natural and durable material derived from tanning animal skins and hides. The value of leather is contingent upon its quality and surface condition, making it imperative to detect defects accurately. Traditionally, detecting leather defects has been labor-intensive and time-consuming, prone to human error and eye strain.
V. Mareeswari, R. Vijayan, Praveen Kumar S., Aravind P. Dhakshan   +3 more
openaire   +1 more source