Measuring earthquakes from optical satellite images

Measuring earthquakes from optical satellite images.

Système pour l'Observation de la Terre images are used to map ground displacements induced by earthquakes. Deformations (offsets) induced by stereoscopic effect and roll, pitch, and yaw of satellite and detector artifacts are estimated and compensated. Images are then resampled in a cartographic projection with a low-bias interpolator. A subpixel correlator in the Fourier domain provides two-di...

Inferring Traffic Activity from Optical Satellite Images

In this paper we describe an approach to automatically estimate movements of vehicles in optical satellite imagery. The approach takes advantage of the fact that the optical axes of the panchromatic and multispectral channels of current spaceborne systems like IKONOS or Quickbird are not coinciding. The time gap that appears between the acquisition of the panchromatic and multispectral data can...

Validation of Aerosol Optical Depth Retrieved from SPOT Satellite Images

In this paper, the image-based retrieval algorithm of aerosol characteristics and surface reflectance is used to retrieve the AOD from SPOT images. The validation of retrieved AOD is made possible by using the AERONET data. Five SPOT satellite images are used to testify the algorithm. The results show that the RMSE of the retrieved AOD are 0.12 and 0.08 in XS1 and XS2 bands, although the larges...

Building Extraction from Satellite Images

A method for detecting buildings from satellite/aerial images is proposed in this paper. The aim is to extract rectilinear buildings by using hypothesis. Hypothesis generation is accomplished by using edge detection and line generation methods. Hypothesis verification is carried out by using information obtained both from the color segmentation of HSV representation of the image. Satellite imag...

Multi Resolution Fuzzy Segmentation of Satellite Images