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/*
* Argyll Color Correction System
*
* Scanrd: Scan chart reader
* This is the core chart recognition code.
*
* Author: Graeme W. Gill
* Date: 28/9/96
*
* Copyright 1995, 1996, 2008, Graeme W. Gill
* All rights reserved.
* This material is licenced under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 :-
* see the License.txt file for licencing details.
*/
/*
* Public Interface and object file for scanrd.c
*/
/* Operation flags */
#define SI_BUILD_REF 0x10000 /* Build the reference file */
#define SI_PERSPECTIVE 0x20000 /* Allow perspective correction */
#define SI_GENERAL_ROT 0x40000 /* Allow general rotation, else assume zero degrees */
#define SI_ASISIFFAIL 0x80000 /* Read patch values "as is" if everything else failes */
/* Scanrd diagnostic flags */
#define SI_SHOW_FLAGS 0xffff /* Mask for all SHOW flags */
#define SI_SHOW_IMAGE 0x0001 /* Show B&W version of input image in output */
#define SI_SHOW_DIFFSH 0x0002 /* Show the horizontal edges detected */
#define SI_SHOW_DIFFSV 0x0004 /* Show the vertical edges detected */
#define SI_SHOW_GROUPS 0x0008 /* Show the groups detected */
#define SI_SHOW_LINES 0x0010 /* Show the lines detected */
#define SI_SHOW_PERS 0x0020 /* Show the lines un-perspective */
#define SI_SHOW_ROT 0x0040 /* Show the lines rotated */
#define SI_SHOW_IMPL 0x0080 /* Show the lines used for improvements */
#define SI_SHOW_ALL_LINES 0x0100 /* Show all lines, valid and invalid */
#define SI_SHOW_SBOX 0x0200 /* Show aligned sample box info in diagnostic raster */
#define SI_SHOW_SBOX_OUTLINES 0x0400 /* Show the sample box outlines */
#define SI_SHOW_SBOX_NAMES 0x0800 /* Show sample boxes names */
#define SI_SHOW_SBOX_AREAS 0x1000 /* Show sample boxes sample areas */
#define SI_SHOW_SAMPLED_AREA 0x2000 /* Show pixels areas sampled */
/* Error flags */
#define SI_QUAL_ERR(flag) ((flag & 0xf0000000) == 0)
#define SI_FIND_PERSPECTIVE_FAILED 0x00000001
#define SI_FIND_ROTATION_FAILED 0x00000002
#define SI_POOR_MATCH 0x00000003
#define SI_FILE_ERR(flag) ((flag & 0xf0000000) == 0x10000000)
#define SI_RAST_READ_ERR 0x10000001
#define SI_DIAG_WRITE_ERR 0x10000002
#define SI_REF_WRITE_ERR 0x10000003
#define SI_REF_READ_ERR 0x10000004
#define SI_REF_FORMAT_ERR 0x10000005
#define SI_PIX_DEPTH_ERR 0x10000006
#define SI_BIT_DEPTH_ERR 0x10000007
#define SI_NO_FIDUCIALS_ERR 0x10000008
#define SI_BAD_FIDUCIALS_ERR 0x10000009 /* Not really file error */
#define SI_MALLOC_ERR(flag) ((flag & 0xf0000000) == 0x80000000)
#define SI_MALLOC_DIAG_RAST 0x80000001
#define SI_MALLOC_INPUT_BUF 0x80000002
#define SI_MALLOC_POINT2LINE 0x80000003
#define SI_MALLOC_ELIST 0x80000004
#define SI_MALLOC_REFREAD 0x80000005
#define SI_MALLOC_SETUP_BOXES 0x80000006
#define SI_MALLOC_VALUE_SCAN 0x80000007
#define SI_MALLOC_VREGION 0x80000008
#define SI_MALLOC_POINTS 0x80000009
#define SI_REALLOC_POINTS 0x8000000A
#define SI_MALLOC_AAINIT 0x8000000B
#define SI_INTERNAL_ERR(flag) ((flag & 0xf0000000) == 0xA0000000)
#define SI_INTERNAL 0xA0000001
/* The public scanrd object */
struct _scanrd {
/*** Public methods ***/
/* Initialise, ready to read out all the values */
/* return the total number of values */
int (*reset)(struct _scanrd *s);
/* Read the next samples values */
/* return non-zero when no more points */
int (*read)(struct _scanrd *s,
char *id, /* patch id copied to here */
double *P, /* Robust mean values */
double *mP, /* Raw Mean values */
double *sdP, /* Standard deviation */
int *cnt); /* Pixel count */
/* Return the error flag, and set the message pointer */
unsigned int (*error)(struct _scanrd *s, char **errm);
/* Free up the structure */
void (*free)(struct _scanrd *s);
}; typedef struct _scanrd scanrd;
/* Read in a chart */
/* Then use reset() and read() to get values read */
scanrd *do_scanrd(
int flags, /* option flags */
int verb, /* verbosity level */
double gamma, /* Approximate gamma encoding of image (0.0 = default 1.7) */
double *sfid, /* Specified fiducuals x1,y1, x2,y2, x3,y3, x4,y4, */
/* Typically clockwise from top left, NULL if auto recognition */
int w, int h, /* Width and Height of input raster in pixels */
int d, int td, int p, /* Useful plane depth, Total depth, Bit presision of input pixels */
int (*read_line)(void *fdata, int y, char *dst), /* Read pixel interleaved line of source */
void *fdata, /* Opaque data for read_line */
char *refname, /* reference file name */
int (*write_line)(void *ddata, int y, char *src), /* Write 8bpp RGB line of diag file */
void *ddata /* Opaque data for write_line */
);
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