Evaluation routine for NURBS encoded spectra
Contents
Syntax
[R, WAVE_NEW] = eval_nurbs(KNOTS, WAVES, CP_REF, CP_WAVE, DEGREE)
Description
This function evaluates the spectra encoded as a spline (NURBS)
Input:
KNOTS: Knot vector - row column.
CP_REF: Control point coordinates in the form of a 3D array of size height x width x ctrl_pts.
CP_WAVE: Control point coordinates in the wavelength domain as given by a row vector of size 1 x ctrl_pts.
WAVES: Wavelength vector for the image.
DEGREE: Degree of the basis (polynominal) functions for the spline. By default, the degree is set to 3;
Output:
R: Spectral image cube, stored as a 3D array of size height x width x bands.
WAVE_NEW: The actual wavelengths where the NURBS have been evaluated.
Example
Encode the spectra on the field HSZ.S.Elements using NURBS of order 2 and
evaluate them afterwards over the same wavelength vector.
[KNOTS, CP_REF, CP_WAVE] = get_nurbs(HSZ.S.Elements, HSZ.HDR.wavelength, 2);
[R, WAVE_NEW] = eval_nurbs(KNOTS, HSZ.HDR.wavelength, CP_REF, CP_WAVE, 2)