遙感成像時(shí),由于飛行器的姿態(tài)(側(cè)滾、俯仰、偏航) 、高度、速度等因素的變化及傳感器自身特性造成圖像像素相對(duì)于地面目標(biāo)的幾何畸變。利用由慣性導(dǎo)航系統(tǒng)同步記錄的CCD 線陣傳感器的外方位元素和在實(shí)驗(yàn)室標(biāo)定的CCD 像元的內(nèi)方位元素建立3 條CCD 線陣傳感器成像的幾何校正模型,通過仿真實(shí)現(xiàn)了遙感成像的幾何 畸變及幾何校正。
關(guān)鍵詞: 幾何校正;共線性方程; 內(nèi)方位元素; 外方位元素
Abstract : When remote sensing ,the change of the aircraft’s attitude data (roll ,pitch , yaw) , height , speed and the property of sensor itself causes the geometric distortions of image pixels relative to surface objects. A geometric correction model of tri2CCD line sensor imaging is established by use of outer orientation elements synchronously recorded by IMU and inner orientation elements cali2 brated in the lab. At last geometric distortions and geometric corrections are simulated on the computer.
Keywords : Geometric correction ; Collinearity equation ; Inner orientation element ; Outer orientation element