Process for enhancing the spatial resolution of multispectral im

Details Process for enhancing the spatial resolution of multispectral im Process for enhancing the spatial resolution of multispectral im

1998-04-29

2000-01-04

Kelley, Christopher S.

Image analysis

Image transformation or preprocessing

382254, 382278, 382299, G06K 936

Patent

active

06011875&

ABSTRACT:
The spatial resolution of a multispectral digital image is enhanced in a process of the type wherein a higher spatial resolution panchromatic image is merged with a plurality of lower spatial resolution spectral band images. A lower spatial resolution panchromatic image is simulated and a Gram-Schmidt transformation is performed on the simulated lower spatial resolution panchromatic image and the plurality of lower spatial resolution spectral band images. The simulated lower spatial resolution panchromatic image is employed as the first band in the Gram-Schmidt transformation. The statistics of the higher spatial resolution panchromatic image are adjusted to match the statistics of the first transform band resulting from the Gram-Schmidt transformation and the higher spatial resolution panchromatic image (with adjusted statistics) is substituted for the first transform band resulting from the Gram-Schmidt transformation to produce a new set of transform bands. Finally, the inverse Gram-Schmidt transformation is performed on the new set of transform bands to produce the enhanced spatial resolution multispectral digital image.

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A. Pellemans et al., "Merging Multispectral and Panchromatic SPOT Images with Respect to the Radiometric Properties of the Sensor", Photogrammetric Engineering & Remote Sensing, vol. 59, No. 1, Jan. 1993, pp. 81-87.

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