| Abstract: | 熱紅外在遙感探測中佔有相當重要的地位，因為其不受日夜條件限制且溫度變化具有指標性意義的特性，使熱紅外影像不僅被用在測量領域，在環境監控、都市開發、災害防治中皆有所發揮。近年來由於技術的進步與成本的降低，面陣列式的熱紅外影像已經逐漸取代傳統空載或衛載的點陣列掃描影像，面陣列熱像儀在近景攝影方面具有快速而且便利的特性，讓熱紅外影像能如同數位相機影像般容易取得。以往利用相機進行攝影測量之前，會先率定拍攝用相機，使影像受鏡頭畸變差的影響減到最低，確保影像坐標對應空間坐標，而目前研究中較少探討熱像儀之率定，本研究將以FLIR-T360紅外線熱像儀為研究對象，探討並率定紅外線熱像儀的影像特性。本研究對熱像儀的率定將分為幾何方面與輻射方面兩種，由於熱像儀無法以傳統方法率定之，因此幾何方面將使用改良型的實地率定法來求取熱像儀的內方位參數；輻射方面則將選用適合的材質作為溫度控制點，利用拍攝控制點蒐集多筆資料擬合出數學模型，進而嘗試導出熱像儀的輻射修正公式。
Thermal infrared holds quite important status in the remote sensing survey, because it is not limit with the condition of day and night, and the temperature change has the representing a significance characteristic, it causes the thermal infrared imagery not only to use in the survey domain, but also the environment monitoring, the metropolis development, and the disaster prevent. In recent years, because the technical progress and reduction of cost, the area-based array`s-like thermal infrared imagery is gradually substituted for the traditional airborne or satellite-borne the spot array scanning phantom, the area-based array thermal imaging system has swift and convenient characteristic, which make the thermal infrared imagery to be similar to digital camera imagery easy to obtain. In the past , before use the camera to proceed the photographic survey, would calibrate the photography-use camera first to let the phantom effected less from the lens variation influence, guarantees the phantom coordinate corresponding the space coordinates, but in the research presently, just a little discusses calibration of the thermal imaging system, this research take the FLIR-T360 infrared thermal imaging system as the object of study, it discusses the characteristic of infrared thermal imaging system`s phantom, and calibrate to it. This research will divide into two kinds to thermal imaging system`s calibration, the geometry aspect and the radiation aspect, because the thermal imaging system is unable calibrate by conventional routes, therefore the geometry aspect will use the improvement calibration on the spot to seek thermal imaging system`s inner orientation element; The radiation aspect will select the suitable material quality to be the temperature control point, and use photographs the control point to collect more data to fit the mathematical model, then attempt to derive the corrective formula of thermal imaging system`s radiation. |
