Functions to shift images

sinfo_new_determine_shift_by_correlation()

determines the sub-pixel shift of to emission line frames by cross sinfo_correlation and fitting the correlation function by a Gaussian

Parameters:
refImage,: reference image
shiftedImage,: image shifted in spectral direction with respect to the reference image
Returns:
shift in sub-pixel accuracy


double sinfo_new_determine_shift_by_correlation (cpl_image *refImage, cpl_image *shiftedImage)

sinfo_new_shift_image_in_spec()

shifts an image by a given amount to integer pixel accuracy

Parameters:
shiftedImage,: image to shift in spectral direction
shift,: amount of shift, output of sinfo_determineShiftByCorrelation
sub_shift,: non-integer rest of shift < 1
Returns:
shifted image


cpl_image * sinfo_new_shift_image_in_spec (cpl_image *shiftedImage, double shift, double *sub_shift)

sinfo_new_fine_shift_image_in_spec_poly()

shifts an image by a given amount to sub-pixel accuracy

Parameters:
shiftedImage,: image to shift in spectral direction
sub_shift,: amount of shift < 1, output of sinfo_shiftImageInSpec
order,: order of polynomial
Returns:
shifted image


cpl_image * sinfo_new_fine_shift_image_in_spec_poly (cpl_image *shiftedImage, double sub_shift, int order)

sinfo_new_fine_shift_image_in_spec_cubicspline()

shifts an image by a given amount to sub-pixel accuracy

Parameters:
shiftedImage,: image to shift in spectral direction
sub_shift,: amount of shift < 1, output of sinfo_shiftImageInSpec
Returns:
shifted image


cpl_image * sinfo_new_fine_shift_image_in_spec_cubic_spline (cpl_image *shiftedImage, double sub_shift)

sinfo_align_cube_to_reference()

shifts images stacked in a cube by a given amount to sub-pixel accuracy

Parameters:
cube,: cube containing images to shift in spectral direction
refIm,: reference image (OH spectrum)
order,: order of polynomial interpolation for the resampling
shift_indicator,: indicator for the polynomial interpolation (0) or cubic spline interpolation shift (1).
Returns:
shifted cube


cpl_imagelist * sinfo_align_cube_to_reference (cpl_imagelist *cube, cpl_image *refIm, int order, int shift_indicator)

Detailed Description

TBD


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