Functions for LSS spectra

Functions

int xsh_spectrum_find_brightest (const cpl_image *in, int offset, spec_shadows shadows, double min_bright, int orient, double *pos)
 Finds the brightest spectrum in an image.
cpl_vector * xsh_spectrum_detect_peaks (const cpl_vector *in, int fwhm, double kappa, int display)
 Detect the brightest features in a spectrum.

Function Documentation

cpl_vector* xsh_spectrum_detect_peaks ( const cpl_vector *  in,
int  fwhm,
double  kappa,
int  display 
)

Detect the brightest features in a spectrum.

Parameters:
in the spectrum
fwhm the FWHM used for the lines convolution
kappa If max(spectrum) > kappa *stdev(spectrum) +median(spectrum) it is a possible line peak
display the flag to display
Returns:
The bright lines positions or NULL in error case

Definition at line 254 of file xsh_spectrum.c.

Referenced by xsh_cfg_recover_measure_tab_xy_peaks().

int xsh_spectrum_find_brightest ( const cpl_image *  in,
int  offset,
spec_shadows  shadows,
double  min_bright,
int  orient,
double *  pos 
)

Finds the brightest spectrum in an image.

Parameters:
in spectral image with spectra
offset the diff. between pos. and neg. spectra
shadows the spectral shadows
min_bright min. bright. required for a spectrum
orient 1 for vertical spec. 0 for horizontal ones
pos the computed spectrum position (1->npix)
Returns:
int 0 if ok, -1 in error case

Finds the brightest spectrum in an image by collapsing the image orthogonally to the spectrum orientation. Spectra are assumed to be horizontal for orient==0, vertical for 1

Definition at line 86 of file xsh_spectrum.c.

References MAX_THRESH_FACT, MIN_THRESH_FACT, select_valid_spectra(), SPEC_MAXWIDTH, SPECTRUM_HW, threshold, and xsh_image_filter_median().


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