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redo im_cntlines() as a class

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This commit is contained in:
John Cupitt 2014-01-17 11:18:05 +00:00
parent 9fbfbb3e48
commit cb96ed814e
13 changed files with 420 additions and 180 deletions
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1
ChangeLog
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@ -37,6 +37,7 @@
- vips_colourspace() allows B_W, GREY16, RGB16 as source / target
- added vips_thread_shutdown(), thanks Lovell
- vips_linear() has a uchar output mode
- redone im_cntlines() as a class
9/1/14 started 7.36.6
- fix some clang compiler warnings

9
libvips/deprecated/vips7compat.c
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@ -4488,3 +4488,12 @@ im_phasecor_fft( IMAGE *in1, IMAGE *in2, IMAGE *out )
return( 0 );
}
int
im_cntlines( VipsImage *im, double *nolines, int flag )
{
return( vips_countlines( im, nolines,
flag == 0 ?
VIPS_DIRECTION_HORIZONTAL : VIPS_DIRECTION_VERTICAL,
NULL ) );
}

2
libvips/include/vips/convolution.h
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@ -83,8 +83,6 @@ int vips_sharpen( VipsImage *in, VipsImage **out, ... )
int vips_gaussblur( VipsImage *in, VipsImage **out, int radius, ... )
__attribute__((sentinel));
void vips_convolution_operation_init( void );
#ifdef __cplusplus
}
#endif /*__cplusplus*/

2
libvips/include/vips/internal.h
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@ -287,6 +287,8 @@ void vips_colour_operation_init( void );
void vips_histogram_operation_init( void );
void vips_freqfilt_operation_init( void );
void vips_create_operation_init( void );
void vips_morphology_operation_init( void );
void vips_convolution_operation_init( void );
guint64 vips__parse_size( const char *size_string );

5
libvips/include/vips/morphology.h
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@ -38,13 +38,16 @@
extern "C" {
#endif /*__cplusplus*/
int vips_countlines( VipsImage *in, double *nolines,
VipsDirection direction, ... )
__attribute__((sentinel));
int im_rank( VipsImage *in, VipsImage *out, int width, int height, int index );
int im_cntlines( VipsImage *im, double *nolines, int flag );
int im_zerox( VipsImage *in, VipsImage *out, int sign );
int im_label_regions( VipsImage *test, VipsImage *mask, int *segments );

2
libvips/include/vips/vips7compat.h
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@ -975,6 +975,8 @@ int im_disp_ps( VipsImage *in, VipsImage *out );
int im_fractsurf( VipsImage *out, int size, double frd );
int im_phasecor_fft( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_cntlines( VipsImage *im, double *nolines, int flag );
#ifdef __cplusplus
}
#endif /*__cplusplus*/

1
libvips/iofuncs/init.c
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@ -271,6 +271,7 @@ vips__init( const char *argv0 )
vips_histogram_operation_init();
vips_convolution_operation_init();
vips_freqfilt_operation_init();
vips_morphology_operation_init();
/* Load up any plugins in the vips libdir. We don't error on failure,
* it's too annoying to have VIPS refuse to start because of a broken

3
libvips/morphology/Makefile.am
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@ -1,7 +1,8 @@
noinst_LTLIBRARIES = libmorphology.la
libmorphology_la_SOURCES = \
im_cntlines.c \
morphology.c \
countlines.c \
hitmiss.c\
im_rank.c \
im_zerox.c \

185
libvips/morphology/countlines.c Normal file
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@ -0,0 +1,185 @@
/* count lines
*
* Copyright: 1990, N. Dessipris.
*
* Author: Nicos Dessipris
* Written on: 02/05/1990
* Modified on :
*
* 19/9/95 JC
* - tidied up
* 23/10/10
* - gtk-doc
* 17/1/14
* - redone as a class, now just a convenience function
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include <vips/debug.h>
#include "pmorphology.h"
typedef struct _VipsCountlines {
VipsMorphology parent_instance;
double nolines;
VipsDirection direction;
} VipsCountlines;
typedef VipsMorphologyClass VipsCountlinesClass;
G_DEFINE_TYPE( VipsCountlines, vips_countlines, VIPS_TYPE_MORPHOLOGY );
static int
vips_countlines_build( VipsObject *object )
{
VipsMorphology *morphology = VIPS_MORPHOLOGY( object );
VipsCountlines *countlines = (VipsCountlines *) object;
VipsImage *in = morphology->in;
VipsImage **t = (VipsImage **) vips_object_local_array( object, 7 );
double nolines;
if( VIPS_OBJECT_CLASS( vips_countlines_parent_class )->build( object ) )
return( -1 );
switch( countlines->direction ) {
case VIPS_DIRECTION_HORIZONTAL:
if( !(t[0] = vips_image_new_matrixv( 1, 2, -1.0, 1.0 )) ||
vips_moreeq_const1( in, &t[1], 128, NULL ) ||
vips_conv( t[1], &t[2], t[0], NULL ) ||
vips_project( t[2], &t[3], &t[4], NULL ) ||
vips_avg( t[3], &nolines, NULL ) )
return( -1 );
break;
case VIPS_DIRECTION_VERTICAL:
if( !(t[0] = vips_image_new_matrixv( 2, 1, -1.0, 1.0 )) ||
vips_moreeq_const1( in, &t[1], 128, NULL ) ||
vips_conv( t[1], &t[2], t[0], NULL ) ||
vips_project( t[2], &t[3], &t[4], NULL ) ||
vips_avg( t[4], &nolines, NULL ) )
return( -1 );
break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
g_object_set( object, "nolines", nolines / 255.0, NULL );
return( 0 );
}
static void
vips_countlines_class_init( VipsCountlinesClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
VIPS_DEBUG_MSG( "vips_countlines_class_init\n" );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "countlines";
vobject_class->description = _( "count lines in an image" );
vobject_class->build = vips_countlines_build;
VIPS_ARG_DOUBLE( class, "nolines", 2,
_( "Nolines" ),
_( "Number of lines" ),
VIPS_ARGUMENT_REQUIRED_OUTPUT,
G_STRUCT_OFFSET( VipsCountlines, nolines ),
0, 10000000, 0.0 );
VIPS_ARG_ENUM( class, "direction", 3,
_( "direction" ),
_( "Countlines left-right or up-down" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsCountlines, direction ),
VIPS_TYPE_DIRECTION, VIPS_DIRECTION_HORIZONTAL );
}
static void
vips_countlines_init( VipsCountlines *countlines )
{
}
/**
* vips_countlines:
* @in: input image
* @nolines: output average number of lines
* @direction: count lines horizontally or vertically
* @...: %NULL-terminated list of optional named arguments
*
* Function which calculates the number of transitions
* between black and white for the horizontal or the vertical
* direction of an image. black<128 , white>=128
* The function calculates the number of transitions for all
* Xsize or Ysize and returns the mean of the result
* Input should be one band, 8-bit.
*
* See also: vips_morph(), vips_zerox(), vips_conv().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_countlines( VipsImage *in, double *nolines,
VipsDirection direction, ... )
{
va_list ap;
int result;
va_start( ap, direction );
result = vips_call_split( "countlines", ap, in, nolines, direction );
va_end( ap );
return( result );
}

131
libvips/morphology/im_cntlines.c
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@ -1,131 +0,0 @@
/* count lines
*
* Copyright: 1990, N. Dessipris.
*
* Author: Nicos Dessipris
* Written on: 02/05/1990
* Modified on :
*
* 19/9/95 JC
* - tidied up
* 23/10/10
* - gtk-doc
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <vips/vips.h>
/**
* im_cntlines:
* @im: input #IMAGE
* @nolines: output average number of lines
* @flag: 0 horizontal, 1 vertical
*
* Function which calculates the number of transitions
* between black and white for the horizontal or the vertical
* direction of an image. black<128 , white>=128
* The function calculates the number of transitions for all
* Xsize or Ysize and returns the mean of the result
* Input should be one band, 8-bit.
*
* See also: im_erode(), im_zerox(), im_conv().
*
* Returns: 0 on success, -1 on error.
*/
int
im_cntlines( IMAGE *im, double *nolines, int flag )
{
int x, y;
VipsPel *line;
int cnt;
if( im_incheck( im ) ||
im_check_uncoded( "im_cntlines", im ) ||
im_check_mono( "im_cntlines", im ) ||
im_check_format( "im_cntlines", im, IM_BANDFMT_UCHAR ) )
return( -1 );
if( flag != 0 && flag != 1 ) {
im_error( "im_cntlines", "%s",
_( "flag should be 0 (horizontal) or 1 (vertical)" ) );
return( -1 );
}
line = im->data;
if( flag == 1 ) {
/* Count vertical lines.
*/
for( cnt = 0, y = 0; y < im->Ysize; y++ ) {
VipsPel *p = line;
for( x = 0; x < im->Xsize - 1; x++ ) {
if( p[0] < 128 && p[1] >= 128 )
cnt++;
else if( p[0] >= 128 && p[1] < 128 )
cnt++;
p++;
}
line += im->Xsize;
}
*nolines = (float) cnt / (2.0 * im->Ysize);
}
else {
/* Count horizontal lines.
*/
for( cnt = 0, y = 0; y < im->Ysize - 1; y++ ) {
VipsPel *p1 = line;
VipsPel *p2 = line + im->Xsize;
for( x = 0; x < im->Xsize; x++ ) {
if( *p1 < 128 && *p2 >= 128 )
cnt++;
else if( *p1 >= 128 && *p2 < 128 )
cnt++;
p1++;
p2++;
}
line += im->Xsize;
}
*nolines = (float) cnt / (2.0 * im->Xsize);
}
return( 0 );
}

45
libvips/morphology/morph_dispatch.c
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@ -39,51 +39,6 @@
#include <vips/vips.h>
/**
* SECTION: morphology
* @short_description: morphological operators, rank filters and related image
* analysis
* @see_also: <link linkend="libvips-boolean">boolean</link>
* @stability: Stable
* @include: vips/vips.h
*
* The morphological functions search images
* for particular patterns of pixels, specified with the mask argument,
* either adding or removing pixels when they find a match. They are useful
* for cleaning up images --- for example, you might threshold an image, and
* then use one of the morphological functions to remove all single isolated
* pixels from the result.
*
* If you combine the morphological operators with the mask rotators
* im_rotate_imask45(), for example) and apply them repeatedly, you
* can achieve very complicated effects: you can thin, prune, fill, open edges,
* close gaps, and many others. For example, see `Fundamentals of Digital
* Image Processing' by A. Jain, pp 384-388, Prentice-Hall, 1989 for more
* ideas.
*
* Beware that VIPS reverses the usual image processing convention, by
* assuming white objects (non-zero pixels) on a black background (zero
* pixels).
*
* The mask you give to the morphological functions should contain only the
* values 0 (for background), 128 (for don't care) and 255 (for object). The
* mask must have odd length sides --- the origin of the mask is taken to be
* the centre value. For example, the mask:
*
* 3 3
* 128 255 128
* 255 0 255
* 128 255 128
*
* applied to an image with im_erode(), will find all black pixels
* 4-way connected with white pixels. Essentially, im_dilate()
* sets pixels in the output if any part of the mask matches, whereas
* im_erode() sets pixels only if all of the mask matches.
*
* See im_andimage(), im_orimage() and im_eorimage()
* for analogues of the usual set difference and set union operations.
*/
/* Args to im_profile.
*/
static im_arg_desc profile_args[] = {

137
libvips/morphology/morphology.c Normal file
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@ -0,0 +1,137 @@
/* base class for all morphological operations
*
* properties:
* - one input image
*/
/*
Copyright (C) 1991-2005 The National Gallery
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "pmorphology.h"
/**
* SECTION: morphology
* @short_description: morphological operators, rank filters and related image
* analysis
* @see_also: <link linkend="libvips-boolean">boolean</link>
* @stability: Stable
* @include: vips/vips.h
*
* The morphological functions search images
* for particular patterns of pixels, specified with the mask argument,
* either adding or removing pixels when they find a match. They are useful
* for cleaning up images --- for example, you might threshold an image, and
* then use one of the morphological functions to remove all single isolated
* pixels from the result.
*
* If you combine the morphological operators with the mask rotators
* im_rotate_imask45(), for example) and apply them repeatedly, you
* can achieve very complicated effects: you can thin, prune, fill, open edges,
* close gaps, and many others. For example, see `Fundamentals of Digital
* Image Processing' by A. Jain, pp 384-388, Prentice-Hall, 1989 for more
* ideas.
*
* Beware that VIPS reverses the usual image processing convention, by
* assuming white objects (non-zero pixels) on a black background (zero
* pixels).
*
* The mask you give to the morphological functions should contain only the
* values 0 (for background), 128 (for don't care) and 255 (for object). The
* mask must have odd length sides --- the origin of the mask is taken to be
* the centre value. For example, the mask:
*
* 3 3
* 128 255 128
* 255 0 255
* 128 255 128
*
* applied to an image with im_erode(), will find all black pixels
* 4-way connected with white pixels. Essentially, im_dilate()
* sets pixels in the output if any part of the mask matches, whereas
* im_erode() sets pixels only if all of the mask matches.
*
* See im_andimage(), im_orimage() and im_eorimage()
* for analogues of the usual set difference and set union operations.
*/
G_DEFINE_ABSTRACT_TYPE( VipsMorphology, vips_morphology,
VIPS_TYPE_OPERATION );
static void
vips_morphology_class_init( VipsMorphologyClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "morphology";
vobject_class->description = _( "morphological operations" );
/* Inputs set by subclassess.
*/
VIPS_ARG_IMAGE( class, "in", 0,
_( "Input" ),
_( "Input image argument" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsMorphology, in ) );
}
static void
vips_morphology_init( VipsMorphology *morphology )
{
}
/* Called from iofuncs to init all operations in this dir. Use a plugin system
* instead?
*/
void
vips_morphology_operation_init( void )
{
extern int vips_countlines_get_type( void );
vips_countlines_get_type();
}

77
libvips/morphology/pmorphology.h Normal file
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@ -0,0 +1,77 @@
/* base class for all morphology operations
*/
/*
Copyright (C) 1991-2005 The National Gallery
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef VIPS_PMORPHOLOGY_H
#define VIPS_PMORPHOLOGY_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
#include <vips/vector.h>
#define VIPS_TYPE_MORPHOLOGY (vips_morphology_get_type())
#define VIPS_MORPHOLOGY( obj ) \
(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
VIPS_TYPE_MORPHOLOGY, VipsMorphology ))
#define VIPS_MORPHOLOGY_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_CAST( (klass), \
VIPS_TYPE_MORPHOLOGY, VipsMorphologyClass))
#define VIPS_IS_MORPHOLOGY( obj ) \
(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_MORPHOLOGY ))
#define VIPS_IS_MORPHOLOGY_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_MORPHOLOGY ))
#define VIPS_MORPHOLOGY_GET_CLASS( obj ) \
(G_TYPE_INSTANCE_GET_CLASS( (obj), \
VIPS_TYPE_MORPHOLOGY, VipsMorphologyClass ))
typedef struct _VipsMorphology VipsMorphology;
struct _VipsMorphology {
VipsOperation parent_instance;
VipsImage *in;
};
typedef struct _VipsMorphologyClass {
VipsOperationClass parent_class;
} VipsMorphologyClass;
GType vips_morphology_get_type( void );
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*VIPS_PMORPHOLOGY_H*/