Multi-filter analysis of infrared images from the excavation experiment in horizontally stratified rocks |
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| Institution: | 1. State Key Laboratory for Geomechanics & Deep Underground Engineering, Beijing 100083, China;2. School of Mechanics and Civil Engineering, China University of Mining & Technology Beijing, Beijing 100083, China;3. School of Mathematics and Statistics, South Central University for Nationalities, Wuhan 430074, China;3. MESA+ Institute for Nanotechnology, Materials Science and Technology of Polymers, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;1. Samsung Research and Development Institute India, Bangalore, India;2. Indian School of Mines (ISM), Dhanbad-826004, Jharkhand, India;1. Department of Immunology, University Complutense, School of Medicine, The Madrid Regional Blood Center, Madrid, Spain;2. Department of Immunology, University Complutense, School of Medicine, Madrid, Spain;3. Department of Inmunología Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Autopista A6, Hipódromo, Madrid, Spain;1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, Hubei 430070, China;2. School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan, Hubei 430205, China |
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| Abstract: | This paper presents a morphological study of the low-resolution and noisy thermogram obtained in the laboratory excavation experiment on the large-scale geological model of man-made horizontally stratified rocks. The developed new image processing algorithm consists of image subtraction, median filter, low-pass alternating-morphological filter, and multi-scale morphological enhancement filter. These filters were used sequentially to process the detected infrared images. In comparison with the old algorithm for thermogram process, the excavation border with changed stress and changed brightness can be distinguished more clearly in the new thermogram sequences. The new algorithm is possible to be applied in processing other low-resolution and noisy thermogram, and the analysis results in this paper are helpful for understanding the pure elastic, the stationary frictional effect and the dynamic frictional effect at the excavation processes. |
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