Resampling satellite scenes

John Stokes

doi:10.1117/12.182867

17 August 1994 Resampling satellite scenes

John Stokes

Proceedings Volume 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision; (1994) https://doi.org/10.1117/12.182867
Event: Spatial Information from Digital Photogrammetry and Computer Vision: ISPRS Commission III Symposium, 1994, Munich, Germany

Abstract

Procedures used for resampling digital images usually assume the underlying function to be band limited, have continuous third derivatives or the like. When objects are present in an image, these requirements are strongly violated. Object boundaries must then be considered. A resampling procedure is designed which starts with a segmentation in order to identify regions which are continuous and smooth. The segment interiors are modelled in a least squares adjustment determining the parameters of a low order polynomial and a residual noise component. Segment boundaries are modelled so as to conform with our concepts of objects. Interpolation is then performed separately in each segment, only using data belonging to the segment. Properties of satellite data are discussed and used as assumptions for deriving an appropriate interpolator. A set of procedures fulfilling these assumptions is described, the simplest procedure being cubic convolution. The tests performed show that the method can handle strong grey level discontinuities. The tests on real scenes are however inconclusive, as discontinuities are smoothed during the production phase.

Citation Download Citation

John Stokes "Resampling satellite scenes", Proc. SPIE 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision, (17 August 1994); https://doi.org/10.1117/12.182867

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