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#ifndef RSPEC_H
/*
* Argyll Color Correction System
*
* Author: Graeme W. Gill
* Date: 20015
*
* Copyright 2006 - 2015 Graeme W. Gill
* All rights reserved.
*
* This material is licenced under the GNU GENERAL PUBLIC LICENSE Version 2 or later :-
* see the License2.txt file for licencing details.
*
* Derived from i1pro_imp.c & munki_imp.c
*/
/*
* A library for processing raw spectrometer values.
*
* Currently this is setup for the EX1 spectrometer,
* but the longer term plan is to expand the functionality
* so that it becomes more generic, and can replace a lot
* of common code in i1pro_imp.c & munki_imp.c.
*/
#ifdef __cplusplus
extern "C" {
#endif
#define RSPEC_MAXSAMP 2048
/* - - - - - - - - - - - - - */
/* Collection of raw samples */
typedef enum {
rspec_sensor, /* Includes shielded/temperature values */
rspec_raw, /* Potential light values */
rspec_wav /* Valid wavelength values */
} rspec_type;
/* The order the state is changed in, is device workflow dependent */
typedef enum {
rspec_none = 0x0000, /* No processing */
rspec_shld = 0x0002, /* Shielded cell corrected */
rspec_dcal = 0x0004, /* Dark calibration subtracted */
rspec_lin = 0x0010, /* Linearized */
rspec_int = 0x0020, /* Integration time adjusted */
rspec_temp = 0x0001, /* Temperature corrected */
rspec_cal = 0x0040 /* Calibrated */
} rspec_state;
struct _rspec {
struct _rspec_inf *inf; /* Base information */
rspec_type stype; /* Spectral type - sensor, raw, cooked */
inst_meas_type mtype; /* Measurement type (emis, ambient, reflective etc.) */
rspec_state state; /* Processing state */
double inttime; /* Integration time */
int nmeas; /* Number of measurements */
int nsamp; /* Number of sensor/wavelength samples */
double **samp; /* [mesa][samples] allocated using numlib. */
}; typedef struct _rspec rspec;
/* - - - - - - - - - - - - - */
/* Base information about characteristics in a given mode */
/* Wavelength resample kernel type */
typedef enum {
rspec_triangle,
rspec_gausian,
rspec_lanczos2,
rspec_lanczos3,
rspec_cubicspline
} rspec_kernel;
/* Group of values */
typedef struct {
int off; /* Offset to start of group */
int num; /* Number in group */
} rspec_group;
struct _rspec_inf {
a1log *log;
int nsen; /* Number of sensor values */
int nshgrps; /* Number of shielded sensor groups */
rspec_group shgrps[2]; /* Shielded group definition */
int nilltkgrps; /* Number of illuminant level tracking groups */
rspec_group illtkgrps[2]; /* illuminant level tracking groups definition */
rspec_group lightrange; /* Range of sensor potential light values transferred to raw */
int nraw; /* Number of raw light sensor values */
rspec_group rawrange; /* Valid range of raw values for filter to wav */
rspec_kernel ktype; /* Re-sampling kernel type */
int nwav; /* Cooked spectrum bands */
double wl_space; /* Wavelength spacing */
double wl_short; /* Cooked spectrum bands short wavelength nm */
double wl_long; /* Cooked spectrum bands short wavelength nm */
/* (Stray light is not currently implemented) */
rspec_type straytype; /* Stray light spectral type - sensor, raw, cooked */
double **straylight; /* [][] Stray light convolution matrix (size ??) */
/* raw index to wavelength polynomial */
unsigned int nwlcal; /* Number in array */
double *wlcal; /* Array of wavelenght cal polinomial factors. */
/* raw index to wavelength re-sampling filters */
int *findex; /* [nwav] raw starting index for each out wavelength */
int *fnocoef; /* [nwav] Number of matrix cooeficients for each out wavelength */
double *fcoef; /* [nwav * nocoef] Packed cooeficients to compute each wavelength */
unsigned int nlin; /* Number in array */
double *lin; /* Array of linearisation polinomial factors. */
int lindiv; /* nz if polinomial result should be divided */
/* Black calibration */
rspec *idark[2]; /* Adaptive dark cal for two integration times */
/* Emission calibration */
rspec_type ecaltype; /* Emissioni calibration type - sensor, raw, cooked */
double *ecal; /* Emission calibration values */
}; typedef struct _rspec_inf rspec_inf;
/* - - - - - - - - - - - - - */
/* Completely clear an rspec_inf. */
void clear_rspec_inf(rspec_inf *inf);
/* Completely free contents of rspec_inf. */
void free_rspec_inf(rspec_inf *inf);
/* return the number of samples for the given spectral type */
int rspec_typesize(rspec_inf *inf, rspec_type ty);
/* Compute the valid raw range from the calibration information */
void rspec_comp_raw_range_from_ecal(rspec_inf *inf);
/* Convert a raw index to nm */
double rspec_raw2nm(rspec_inf *inf, double rix);
/* Convert a cooked index to nm */
double rspec_wav2nm(rspec_inf *inf, double ix);
/* Create the wavelength resampling filters */
void rspec_make_resample_filters(rspec_inf *inf);
/* Plot the first rspec */
void plot_rspec1(rspec *p);
/* Plot the first rspec of 2 */
void plot_rspec2(rspec *p1, rspec *p2);
/* Plot the wave resampling filters */
void plot_resample_filters(rspec_inf *inf);
/* Plot the calibration curves */
void plot_ecal(rspec_inf *inf);
/* - - - - - - - - - - - - - */
/* Create a new rspec from scratch */
/* This always succeeds (i.e. application bombs if malloc fails) */
rspec *new_rspec(rspec_inf *inf, rspec_type ty, int nmeas);
/* Create a new rspec based on an existing prototype */
/* If nmes == 0, create space for the same number or measurements */
rspec *new_rspec_proto(rspec *rs, int nmeas);
/* Create a new rspec by cloning an existing one */
rspec *new_rspec_clone(rspec *rs);
/* Free a rspec */
void del_rspec(rspec *rs);
/* - - - - - - - - - - - - - */
/* Return the largest value */
double largest_val_rspec(int *pmix, int *psix, rspec *raw);
/* return a raw rspec from a sensor rspec */
rspec *extract_raw_from_sensor_rspec(rspec *sens);
/* Return an interpolated dark reference value from idark */
double ex1_interp_idark_val(rspec_inf *inf, int mix, int six, double inttime);
/* Return an interpolated dark reference from idark */
rspec *ex1_interp_idark(rspec_inf *inf, double inttime);
/* Subtract the adaptive black */
void subtract_idark_rspec(rspec *raw);
/* Apply non-linearity to a single value */
double linearize_val_rspec(rspec_inf *inf, double ival);
/* Invert non-linearity of a single value */
double inv_linearize_val_rspec(rspec_inf *inf, double targv);
/* Correct non-linearity */
void linearize_rspec(rspec *raw);
/* Apply the emsissive calibration */
void emis_calibrate_rspec(rspec *sens);
/* Scale to the integration time */
void inttime_calibrate_rspec(rspec *sens);
/* return a wav rspec from a raw rspec */
rspec *convert_wav_from_raw_rspec(rspec *sens);
/* - - - - - - - - - - - - - */
/* Calibration file support */
typedef struct {
a1log *log;
int lo_secs; /* Seconds since last opened (from file mod time) */
FILE *fp;
int rd; /* 0 = dummy read, 1 = real read */
int ef; /* Error flag, 1 = write failed, 2 = close failed */
unsigned int chsum; /* Checksum */
int nbytes; /* Number of bytes checksummed */
char *buf; /* Dummy read buffer */
size_t bufsz; /* Size of dumy read buffer */
} calf;
int calf_open(calf *x, a1log *log, char *fname, int wr);
void calf_rewind(calf *x);
int calf_touch(a1log *log, char *fname);
int calf_done(calf *x);
void calf_wints(calf *x, int *dp, int n);
void calf_wdoubles(calf *x, double *dp, int n);
void calf_wtime_ts(calf *x, time_t *dp, int n);
void calf_wstrz(calf *x, char *dp);
void calf_rints(calf *x, int *dp, int n);
void calf_rints2(calf *x, int *dp, int n);
void calf_rdoubles(calf *x, double *dp, int n);
void calf_rtime_ts(calf *x, time_t *dp, int n);
void calf_rstrz(calf *x, char **dp);
void calf_rstrz2(calf *x, char **dp);
/* Save a rspec to a calibration file */
void calf_wrspec(calf *x, rspec *dp);
/* Restore a rspec from a calibration file */
void calf_rrspec(calf *x, rspec **dp, rspec_inf *inf);
#ifdef __cplusplus
}
#endif
#define RSPEC_H
#endif /* RSPEC_H */
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