Inverse kriging to enhance spatial resolution of imagery

Gregg M. Petrie; Patrick G. Heasler; Eileen M. Perry; Sandra E. Thompson; Don S. Daly

doi:10.1117/12.454822

27 November 2002 Inverse kriging to enhance spatial resolution of imagery

Gregg M. Petrie, Patrick G. Heasler, Eileen M. Perry, Sandra E. Thompson, Don S. Daly

Proceedings Volume 4789, Algorithms and Systems for Optical Information Processing VI; (2002) https://doi.org/10.1117/12.454822
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

We describe a unique approach to image resolution enhancement, inverse kriging (IK), which takes advantage of the spatial relationship between high- and low-resolution images within an area of overlap. Once established, this mathematical relationship then can be applied across the entire low-resolution image to significantly sharpen the image. The mathematical relationship uses the spatial correlations within the low-resolution image and between the low and high spatial-resolution imagery. Two of the most important requirements of the technique are that the images be co-registered well within the resolution of the larger pixels and that the spatial structure of the training area (where the spatial correlation statistics are computed) is similar to the structure of the remaining image area where it will be applied. Testing was performed using same-sensor and multi-sensor imagery. We show results that indicate that the method does improve the low spatial-resolution imagery. The selection of a training area spatial structure similar to the area being processed is important, as areas with different spatial structure (e.g., vegetation versus buildings and roads) will produce poor results. Comparisons with bilinear interpolation demonstrate that IK could be used as an improved interpolation tool, for example, in the image-registration process.

Citation Download Citation

Gregg M. Petrie, Patrick G. Heasler, Eileen M. Perry, Sandra E. Thompson, and Don S. Daly "Inverse kriging to enhance spatial resolution of imagery", Proc. SPIE 4789, Algorithms and Systems for Optical Information Processing VI, (27 November 2002); https://doi.org/10.1117/12.454822

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