A high-resolution three-dimensional far-infrared thermal and true-color imaging system for medical applications |
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| Authors: | Victor S. Cheng Jinfen Bai Yazhu Chen |
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| Affiliation: | 1. Department of Medicine, University of Chicago, United States;2. Department of Health Studies, University of Chicago, United States;3. Department of Radiation and Cellular Oncology, University of Chicago, United States;4. University of Chicago Comprehensive Cancer Center, United States;5. Material Science Division, Argonne National Laboratory, United States;6. B.Verkin Institute for Low Temperature Physics and Engineering, Kharkiv 61103, Ukraine;1. School of Electronic and Information Engineering, Tianjin University, Tianjin, PR China;2. Institute of Electronic and Information, Hangzhou Dianzi University, Hangzhou, PR China;1. PhD Student, Section for Oral Radiology and Section for Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus University Graduate School of Health, Aarhus, Denmark;2. Research Assistant, Section for Oral Radiology and Section for Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus, Denmark;3. Professor, Section for Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus University Graduate School of Health, Aarhus, Denmark;4. Professor, Section for Biostatistics, Department of Public Health, Aarhus University Graduate School of Health, Aarhus, Denmark;6. Professor, Section for Oral Radiology, Department of Dentistry, Aarhus University Graduate School of Health, Aarhus, Denmark;1. School of Population Health, The University of Queensland, Herston Road, Queensland 4006, Australia;2. Cancer and Population Studies Unit, The Queensland Institute of Medical Research, Herston Road, Queensland 4006, Australia;3. Centre for Youth Substance Abuse Research, The University of Queensland, Herston Road, Queensland 4006, Australia;4. School of Translational Medicine, University of Manchester, Manchester Academic Health, Science Centre, Manchester M13 9PL, UK |
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| Abstract: | As the needs for various kinds of body surface information are wide-ranging, we developed an imaging-sensor integrated system that can synchronously acquire high-resolution three-dimensional (3D) far-infrared (FIR) thermal and true-color images of the body surface. The proposed system integrates one FIR camera and one color camera with a 3D structured light binocular profilometer. To eliminate the emotion disturbance of the inspector caused by the intensive light projection directly into the eye from the LCD projector, we have developed a gray encoding strategy based on the optimum fringe projection layout. A self-heated checkerboard has been employed to perform the calibration of different types of cameras. Then, we have calibrated the structured light emitted by the LCD projector, which is based on the stereo-vision idea and the least-squares quadric surface-fitting algorithm. Afterwards, the precise 3D surface can fuse with undistorted thermal and color images. To enhance medical applications, the region-of-interest (ROI) in the temperature or color image representing the surface area of clinical interest can be located in the corresponding position in the other images through coordinate system transformation. System evaluation demonstrated a mapping error between FIR and visual images of three pixels or less. Experiments show that this work is significantly useful in certain disease diagnoses. |
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