Title :
Registration and BRDF extraction of airborne multi-angular images in different resolutions
Author :
Liu, Q. ; Liu, Q.H. ; Xiao, Q. ; Tian, G.L. ; Li, X.W.
Author_Institution :
Inst. of Remote Sensing Application, Acad. Sinica, Beijing, China
Abstract :
An auto-registration algorithm is designed for multi-angular remote sensing, which refines the image warping function in a step-by-step way. It first uses a wavelet transform to degrade the original images to a series of low resolution ones, then constructs warping function with B-splines, and refines the B-splines according to control points found by a correlation based method. The algorithm is tested with images acquired in North-China by an airborne multi-angular TIR/VNIR imaging system. Results show the advantage of B-splines in comparison with polynomial or thin-plate splines. After registration is done, we give an example for BRDF extraction
Keywords :
geophysical signal processing; image registration; image resolution; remote sensing; splines (mathematics); wavelet transforms; B-spline; BRDF extraction; North-China; TIR/VNIR imaging system; airborne multi-angular images; airborne multi-angular imaging system; auto-registration algorithm; bi-directional reflectance; control points; correlation based method; image warping function; multi-angular remote sensing; registration; resolutions; wavelet transform; Algorithm design and analysis; Content addressable storage; Electrical capacitance tomography; Geographic Information Systems; Image resolution; Polynomials; Potential well; Remote sensing; Spline; Surface fitting;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.976167
