Automatic Relative Registration of Spot5 Imagery for Color Merging
نویسندگان
چکیده
An automatic process for relative registering and merging the panchromatic and multispectral images of SPOT5 is presented. The automated hierarchical local registration process makes use of feature information to select tie points from both images. The tie points are then used to refine the sensor model of the multispectral image by method of least squares solution. Both panchromatic and multispectral images are then orthorectified to a geo-referenced coordinate system using the available one kilometre gridded Digital Elevation Models (GLOBE or SRTM DEM). The merged high resolution colour imagery is then obtained by multiplying each spectral bands with a sharpening factor computed from the intensity values of the orthorectified panchromatic image and the corresponding pixels of the orthorectified multispectral images.
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