LARS Tech Report Number
Investigation has been conducted into means of improving the image correlator and overlay function portions of the LARS image registration system. The fast Fourier transform correlator was analysed in detail and a modified version was programmed and tested. More reliable and accurate correlation has been achieved on both multispectral and multitemporal scanner imagery and Apollo 9 digitised multispectral photography. A quadratic overlay function was developed which uses local correlation checkpoints to interpolate the required overlay shifts between checkpoints. these improvements are described in the memo. The modified correlator is checked out and ready for inclusion in the registration system. More work is required on the overly function to implement it in the system.
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