tailieunhanh - Báo cáo hóa học: " Research Article Fabric Defect Detection Using Modified Local Binary Patterns"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Fabric Defect Detection Using Modified Local Binary Patterns | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 783898 12 pages doi 2008 783898 Research Article Fabric Defect Detection Using Modified Local Binary Patterns F. Tajeripour 1 E. Kabir 1 and A. Sheikhi2 1 Department of Electrical Engineering Tarbiat Modarres University . Box 14115-111 Tehran Iran 2 Department of Electrical and Electronics Engineering Shiraz University . Box 71348-51154 Shiraz Iran Correspondence should be addressed to Farshad Tajeripour tajeri@ Received 24 December 2006 Revised 22 May 2007 Accepted 4 October 2007 Recommended by Liang-Gee Chen Local binary patterns LBPs are one of the features which have been used for texture classification. In this paper a method based on using these features is proposed for fabric defect detection. In the training stage at first step LBP operator is applied to an image of defect free fabric pixel by pixel and the reference feature vector is computed. Then this image is divided into windows and LBP operator is applied to each of these windows. Based on comparison with the reference feature vector a suitable threshold for defect free windows is found. In the detection stage a test image is divided into windows and using the threshold defective windows can be detected. The proposed method is multiresolution and gray scale invariant and can be used for defect detection in patterned and unpatterned fabrics. Because of its simplicity online implementation is possible as well. Copyright 2008 F. Tajeripour et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Defect detection is an important problem in fabric quality control process. Cost reduction in production and inspection process is also an important objective for textile manufacturers. At present the quality .