Zhang Guo-Kun, Chen Chun, Xing Fu, Zhang Hong-Yan, Zhao Yun-Sheng
College of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 Mar;28(3):494-8.
The present article uses the basic operation of the digital remote image radiometric calibration of the Quickbird with high distinguishing rate, including the physical attribute and the mathematical basement of digital images, the annotation as well as the format of image data. The study makes use of information of spectral radiance from the ground-atmosphere system, which is recorded by the digital remote image of Quick Bird in Honghe area. This dissertation offered the calculation means of radiometric calibration, and changed the pixel digital number into band-integrated radiance. Then, the spectral radiance was calculated. After the radiometric calibration, the Quick Bird image showed the quantitative information of spectral feature from various ground items. Only through the calibration can the Quick Bird image be quantitatively compared and analyzed with other remote sensor images. Thus, the inversion image has the value of application. The significance consists in offering important basic condition for the image amalgamation and better disposal of the special inforation pick-up. This effort also offered spectral information of the ground items for the inversion of the remote image. Therefore, the authors can combine the research of the spectral character of ground items with the establishment of the remote application model in order to quantitatively analyze the ground items.
本文采用高分辨率Quickbird数字遥感影像辐射定标的基本操作，包括数字图像的物理属性、数学基础、图像数据的标注及格式。该研究利用了Quick Bird数字遥感影像记录的红河地区地-气系统光谱辐射信息。本论文给出了辐射定标的计算方法，将像元数字量转换为波段积分辐射亮度，进而计算出光谱辐射亮度。经过辐射定标后，Quick Bird影像呈现出各类地物光谱特征的定量信息。只有经过定标，Quick Bird影像才能与其他遥感影像进行定量比较和分析，从而使反演影像具有应用价值。其意义在于为影像融合及更好地处理专题信息提取提供重要的基础条件。这一工作也为遥感影像反演提供了地物光谱信息。因此，作者可将地物光谱特征研究与遥感应用模型建立相结合，对地物进行定量分析。
