#include <math.h>
#include "allheaders.h"

Macros
#define	L_BUF_SIZE 512

Functions
SELA *	selaAddBasic (SELA *sela)

SELA *	selaAddHitMiss (SELA *sela)

SELA *	selaAddDwaLinear (SELA *sela)

SELA *	selaAddDwaCombs (SELA *sela)

SELA *	selaAddCrossJunctions (SELA *sela, l_float32 hlsize, l_float32 mdist, l_int32 norient, l_int32 debugflag)

SELA *	selaAddTJunctions (SELA *sela, l_float32 hlsize, l_float32 mdist, l_int32 norient, l_int32 debugflag)

SELA *	sela4ccThin (SELA *sela)

SELA *	sela8ccThin (SELA *sela)

SELA *	sela4and8ccThin (SELA *sela)

SEL *	selMakePlusSign (l_int32 size, l_int32 linewidth)

Variables
static const l_int32	num_linear = 25

static const l_int32	basic_linear []

static const char *	sel_4_1

static const char *	sel_4_2

static const char *	sel_4_3

static const char *	sel_4_4

static const char *	sel_4_5

static const char *	sel_4_6

static const char *	sel_4_7

static const char *	sel_4_8

static const char *	sel_4_9

static const char *	sel_8_1

static const char *	sel_8_2

static const char *	sel_8_3

static const char *	sel_8_4

static const char *	sel_8_5

static const char *	sel_8_6

static const char *	sel_8_7

static const char *	sel_8_8

static const char *	sel_8_9

static const char *	sel_48_1

static const char *	sel_48_2

Detailed Description


     Contains definitions of simple structuring elements

     Basic brick structuring elements
         SELA    *selaAddBasic()
              Linear horizontal and vertical
              Square
              Diagonals

     Simple hit-miss structuring elements
         SELA    *selaAddHitMiss()
              Isolated foreground pixel
              Horizontal and vertical edges
              Slanted edge
              Corners

     Structuring elements for comparing with DWA operations
         SELA    *selaAddDwaLinear()
         SELA    *selaAddDwaCombs()

     Structuring elements for the intersection of lines
         SELA    *selaAddCrossJunctions()
         SELA    *selaAddTJunctions()

     Structuring elements for connectivity-preserving thinning operations
         SELA    *sela4ccThin()
         SELA    *sela8ccThin()
         SELA    *sela4and8ccThin()

     Other structuring elements
         SEL    *selMakePlusSign()

Definition in file sel2.c.

Macro Definition Documentation

◆ L_BUF_SIZE

#define L_BUF_SIZE 512

Definition at line 71 of file sel2.c.

Function Documentation

◆ sela4and8ccThin()

SELA * sela4and8ccThin ( SELA * sela )

sela4and8ccThin()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds the 2 basic sels for either 4-cc or 8-cc thinning.

Definition at line 834 of file sel2.c.

◆ sela4ccThin()

SELA * sela4ccThin ( SELA * sela )

sela4ccThin()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds the 9 basic sels for 4-cc thinning.

Definition at line 752 of file sel2.c.

◆ sela8ccThin()

SELA * sela8ccThin ( SELA * sela )

sela8ccThin()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds the 9 basic sels for 8-cc thinning.

Definition at line 793 of file sel2.c.

◆ selaAddBasic()

SELA * selaAddBasic ( SELA * sela )

selaAddBasic()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds the following sels:
           ~ all linear (horiz, vert) brick sels that are
             necessary for decomposable sels up to size 63
           ~ square brick sels up to size 10
           ~ 4 diagonal sels

Definition at line 99 of file sel2.c.

References L_BUF_SIZE.

◆ selaAddCrossJunctions()

SELA * selaAddCrossJunctions	(	SELA *	sela,
		l_float32	hlsize,
		l_float32	mdist,
		l_int32	norient,
		l_int32	debugflag )

selaAddCrossJunctions()

Parameters

[in]	sela	[optional]
[in]	hlsize	length of each line of hits from origin
[in]	mdist	distance of misses from the origin
[in]	norient	number of orientations; max of 8
[in]	debugflag	1 for debug output

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds hitmiss Sels for the intersection of two lines.
         If the lines are very thin, they must be nearly orthogonal
         to register.
     (2) The number of Sels generated is equal to norient.
     (3) If norient == 2, this generates 2 Sels of crosses, each with
         two perpendicular lines of hits.  One Sel has horizontal and
         vertical hits; the other has hits along lines at +-45 degrees.
         Likewise, if norient == 3, this generates 3 Sels of crosses
         oriented at 30 degrees with each other.
     (4) It is suggested that hlsize be chosen at least 1 greater
         than mdist.  Try values of (hlsize, mdist) such as
         (6,5), (7,6), (8,7), (9,7), etc.

Definition at line 430 of file sel2.c.

References L_BUF_SIZE, L_INSERT, and L_SET_PIXELS.

◆ selaAddDwaCombs()

SELA * selaAddDwaCombs ( SELA * sela )

selaAddDwaCombs()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds all comb (horizontal, vertical) Sels that are
         used in composite linear morphological operations
         up to 63 pixels in length, which are the sizes over
         which dwa code can be generated.

Definition at line 362 of file sel2.c.

References L_BUF_SIZE.

◆ selaAddDwaLinear()

SELA * selaAddDwaLinear ( SELA * sela )

selaAddDwaLinear()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds all linear (horizontal, vertical) sels from
         2 to 63 pixels in length, which are the sizes over
         which dwa code can be generated.

Definition at line 322 of file sel2.c.

References L_BUF_SIZE.

◆ selaAddHitMiss()

SELA * selaAddHitMiss ( SELA * sela )

selaAddHitMiss()

Parameters

[in] sela [optional]

Returns: sela with additional sels, or NULL on error

Definition at line 186 of file sel2.c.

◆ selaAddTJunctions()

SELA * selaAddTJunctions	(	SELA *	sela,
		l_float32	hlsize,
		l_float32	mdist,
		l_int32	norient,
		l_int32	debugflag )

selaAddTJunctions()

Parameters

[in]	sela	[optional]
[in]	hlsize	length of each line of hits from origin
[in]	mdist	distance of misses from the origin
[in]	norient	number of orientations; max of 8
[in]	debugflag	1 for debug output

Returns: sela with additional sels, or NULL on error

Notes:
     (1) Adds hitmiss Sels for the T-junction of two lines.
         If the lines are very thin, they must be nearly orthogonal
         to register.
     (2) The number of Sels generated is 4 * norient.
     (3) It is suggested that hlsize be chosen at least 1 greater
         than mdist.  Try values of (hlsize, mdist) such as
         (6,5), (7,6), (8,7), (9,7), etc.

Definition at line 553 of file sel2.c.

References L_BUF_SIZE, L_INSERT, and L_SET_PIXELS.

◆ selMakePlusSign()

SEL * selMakePlusSign	(	l_int32	size,
		l_int32	linewidth )

selMakePlusSign()

Parameters

[in]	size	side of containing square
[in]	linewidth	of lines

Returns: sel, or NULL on error

Notes:
     (1) Useful for debugging to show location of selected pixels.
     (2) See displaySelectedPixels() for an example of use.

Definition at line 866 of file sel2.c.

References L_SET_PIXELS.

Variable Documentation

◆ basic_linear

const l_int32 basic_linear[]

static

Initial value:

= {2, 3, 4, 5, 6, 7, 8, 9, 10, 11,

12, 13, 14, 15, 20, 21, 25, 30, 31, 35, 40, 41, 45, 50, 51}

Definition at line 76 of file sel2.c.

◆ num_linear

const l_int32 num_linear = 25

static

Definition at line 75 of file sel2.c.

◆ sel_48_1

const char* sel_48_1

static

Initial value:

= " xx"
                              "oCx"
                              "oo "

Definition at line 732 of file sel2.c.

◆ sel_48_2

const char* sel_48_2

static

Initial value:

= "o x"
                              "oCx"
                              "o x"

Definition at line 735 of file sel2.c.

◆ sel_4_1

const char* sel_4_1

static

Initial value:

= "  x"
                             "oCx"
                             "  x"

Definition at line 674 of file sel2.c.

◆ sel_4_2

const char* sel_4_2

static

Initial value:

= "  x"
                             "oCx"
                             " o "

Definition at line 677 of file sel2.c.

◆ sel_4_3

const char* sel_4_3

static

Initial value:

= " o "
                             "oCx"
                             "  x"

Definition at line 680 of file sel2.c.

◆ sel_4_4

const char* sel_4_4

static

Initial value:

= " o "
                             "oCx"
                             " o "

Definition at line 683 of file sel2.c.

◆ sel_4_5

const char* sel_4_5

static

Initial value:

= " ox"
                             "oCx"
                             " o "

Definition at line 686 of file sel2.c.

◆ sel_4_6

const char* sel_4_6

static

Initial value:

= " o "
                             "oCx"
                             " ox"

Definition at line 689 of file sel2.c.

◆ sel_4_7

const char* sel_4_7

static

Initial value:

= " xx"
                             "oCx"
                             " o "

Definition at line 692 of file sel2.c.

◆ sel_4_8

const char* sel_4_8

static

Initial value:

= "  x"
                             "oCx"
                             "o x"

Definition at line 695 of file sel2.c.

◆ sel_4_9

const char* sel_4_9

static

Initial value:

= "o x"
                             "oCx"
                             "  x"

Definition at line 698 of file sel2.c.

◆ sel_8_1

const char* sel_8_1

static

Initial value:

= " x "
                             "oCx"
                             " x "

Definition at line 703 of file sel2.c.

◆ sel_8_2

const char* sel_8_2

static

Initial value:

= " x "
                             "oCx"
                             "o  "

Definition at line 706 of file sel2.c.

◆ sel_8_3

const char* sel_8_3

static

Initial value:

= "o  "
                             "oCx"
                             " x "

Definition at line 709 of file sel2.c.

◆ sel_8_4

const char* sel_8_4

static

Initial value:

= "o  "
                             "oCx"
                             "o  "

Definition at line 712 of file sel2.c.

◆ sel_8_5

const char* sel_8_5

static

Initial value:

= "o x"
                             "oCx"
                             "o  "

Definition at line 715 of file sel2.c.

◆ sel_8_6

const char* sel_8_6

static

Initial value:

= "o  "
                             "oCx"
                             "o x"

Definition at line 718 of file sel2.c.

◆ sel_8_7

const char* sel_8_7

static

Initial value:

= " x "
                             "oCx"
                             "oo "

Definition at line 721 of file sel2.c.

◆ sel_8_8

const char* sel_8_8

static

Initial value:

= " x "
                             "oCx"
                             "ox "

Definition at line 724 of file sel2.c.

◆ sel_8_9

const char* sel_8_9

static

Initial value:

= "ox "
                             "oCx"
                             " x "

Definition at line 727 of file sel2.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ L_BUF_SIZE

Function Documentation

◆ sela4and8ccThin()

◆ sela4ccThin()

◆ sela8ccThin()

◆ selaAddBasic()

◆ selaAddCrossJunctions()

◆ selaAddDwaCombs()

◆ selaAddDwaLinear()

◆ selaAddHitMiss()

◆ selaAddTJunctions()

◆ selMakePlusSign()

Variable Documentation

◆ basic_linear

◆ num_linear

◆ sel_48_1

◆ sel_48_2

◆ sel_4_1

◆ sel_4_2

◆ sel_4_3

◆ sel_4_4

◆ sel_4_5

◆ sel_4_6

◆ sel_4_7

◆ sel_4_8

◆ sel_4_9

◆ sel_8_1

◆ sel_8_2

◆ sel_8_3

◆ sel_8_4

◆ sel_8_5

◆ sel_8_6

◆ sel_8_7

◆ sel_8_8

◆ sel_8_9