| Popis: |
Camera calibration is an indispensable process for improving measurement accuracy in industry fields such as machine vision. However, existing calibration cannot be applied to the calibration of mid-wave and long-wave infrared cameras. Recently, with the growing use of infrared thermal cameras that can measure defects from thermal properties, development of an applicable calibration target has become necessary. Thus, based on heat conduction analysis using finite element analysis, we developed a calibration target that can be used with both existing visible cameras and infrared thermal cameras, by implementing optimal design conditions, with consideration of factors such as thermal conductivity and emissivity, colors and materials. We performed comparative experiments on calibration target images from infrared thermal cameras and visible cameras. The results demonstrated the effectiveness of the proposed calibration target. Keywords: Thermography, Lens Distortion, Calibration, Visible Image Thermal Image[접수일: 2014. 5. 13, 수정일: 2014. 6. 20, 게재확정일: 2014. 6. 21] *한국표준과학연구원 삶의질측정표준본부 , **상명대학교 문화기술연구소, ***상명대학교 컴퓨터과학과, ✝Corresponding Author: Metrology for Quality of Life, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea (E-mail: mychoi@kriss.re.kr) |
