1. An image processing system for combining at least a portion of a panchromatic image block at a first resolution with at least corresponding cogeolocated portions of n spectral band image blocks of a second resolution lower than the first resolution, where n is an integer that is at least as large as two, the system comprising: circuitry for upsampling the corresponding portions of the n spectral band image blocks at the second resolution to form n upsampled spectral band image blocks; circuitry for transforming the n upsampled spectral band image blocks to a hyperspherical color space to form hyperspherical color space image blocks including, for each pixel in the hyperspherical color space image block, a hyperspherical intensity and n-1 hyperspherical angles; circuitry for intensity matching the intensities of the hyperspherical color space image blocks with intensities of corresponding pixels in the panchromatic image block to form intensity adjusted hyperspherical color space image blocks; and circuitry for reverse transforming the intensity adjusted hyperspherical color space image blocks into n reverse transformed spectral band image blocks.