18 October 1999 Coregistration of wedge spectrometer data in the near-IR region via the method of integral projection
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Abstract
The technique of integral projections is used to perform co- registration of data from a wedge spectrometer instrument that has been developed by NASA Goddard Space Flight Center. The spectrometer is currently being flown on a plane and operates in the 1 - 2.5 micron range. The technique involves a number of steps. First, an algorithm was developed to calculate the absorption bands that occur within the spectral region. At this point the method of Integral Projections is used to vectorize the image. The Integral Projections method performs a number of key functions in the registration process: increases SNR, reduces affects of spatial non-uniformities within the data, and results in a much faster algorithm since the operation is on vectors. The final step is to register the zero crossing of the second derivative of the vectors. Two issues encountered with co-registration is dealing with the absorption bands that occur within the spectral region of interest and the multiple problem of recognizing features that are not only shifting in x and y but also appear different at different wavelengths. Results will be presented in which the application of our algorithm obtains the appropriate x,y shifts necessary to reconstruct a registered data cube.
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Stephen C. Cain, Peter Mantica, Dawn Buchanan, Dennis C. Reuter, George H. McCabe, William E. Sharp, Mark C. Abrams, "Coregistration of wedge spectrometer data in the near-IR region via the method of integral projection", Proc. SPIE 3808, Applications of Digital Image Processing XXII, (18 October 1999); doi: 10.1117/12.365834; https://doi.org/10.1117/12.365834
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