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COLOR REPRESENTATION OF TEXTILE FABRIC USING MULTISPECTRAL IMAGING TECHNOLOGY
L Luo,S J Shao,H L Shen,J H Xin 한국색채학회 2011 한국색채학회 학술대회 Vol.2011 No.10
As the normal colour measurement method of using a spectrophotometer is impossible to measure colours of multi-coloured textiles fabric samples such as color printing sample, and knitted samples using colored yams, color measurement method based on the multispectral imaging technique is a viable alternative. In this paper, we propose a new novel approach to represent the spectral colors of these textile samples. Firstly, the reflectance of captured image by a self-developed multispectral imaging system is recovered by the Wiener estimation method at each pixel spatial location. Secondly, a bilateral filter method is used to remove the signal dependent noise mainly caused by the imaged object during the imaging acquisition procedure. After that, an unsupervised tree structure is constructed to segment denoised image. Finally, all color regions are extracted from the segmented image of a multi-color printing sample to represent the dominant colors weighted with the segmented block size. In the case of representation of yam-dyed textile image, a K-mean clustering method is further used to extract the spectral colors of weft and warp yam, respectively.
Investigation on the failure mechanism of steel-concrete steel composite beam
Guang P. Zou,Pei X. Xia,,Xin H. Shen,Peng Wang 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.20 No.6
The internal crack propagation, the failure mode and ultimate load bearing capacity of the steelconcrete-steel composite beam under the four-point-bend loading is investigated by the numerical simulation. The results of load - displacement curve and failure mode are in good agreement with experiment. In order to study the failure mechanism, the composite beam has been modeled, which part interface interaction between steel and concrete is considered. The results indicate that there are two failure modes: (a) When the strength of the interface is lower than that of the concrete, failure happens at the interface of steel and concrete;(b) When the strength of the interface is higher than that of the concrete, the failure modes is cohesion failure, i.e., and concrete are stripped because of the shear cracks at concrete edge.