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.

Detailed Description

Function Documentation

xsh_spectrum_detect_peaks()

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 255 of file xsh_spectrum.c.

References kappa, and max.

Referenced by xsh_cfg_recover_measure_tab_xy_peaks().

xsh_spectrum_find_brightest()

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