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dE_from_lab() as a class

This commit is contained in:
John Cupitt 2012-10-25 23:07:09 +01:00
parent 1e121f2da7
commit db0c05434f
9 changed files with 294 additions and 25 deletions
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3
ChangeLog
View File

@ -3,7 +3,8 @@
im_LCh2UCS(), im_XYZ2Yxy(), im_Yxy2XYZ(), im_float2rad(), im_rad2float(),
im_Lab2LabQ(), im_LabQ2Lab(), im_Lab2LabS(), im_LabS2Lab(), im_LabQ2LabS(),
im_LabS2LabQ(), im_LabQ2disp(), im_XYZ2disp(), im_disp2XYZ(),
im_icc_import*(), im_icc_export*(), im_icc_transform*() as classes
im_icc_import*(), im_icc_export*(), im_icc_transform*(), im_dE_fromLab()
as classes
- added vips_colour_convert(), replaces all derived conversions
- dzsave can write zoomify and google maps layout as well
- tilecache supports threaded access

4
libvips/colour/Makefile.am
View File

@ -4,6 +4,7 @@ libcolour_la_SOURCES = \
colour.c \
colour_funcs.c \
colour_dispatch.c \
dE76.c \
icc_transform.c \
Lab2XYZ.c \
Lab2LCh.c \
@ -26,7 +27,6 @@ libcolour_la_SOURCES = \
sRGB2XYZ.c \
im_lab_morph.c \
im_dE00_fromLab.c \
im_dECMC_fromLab.c \
im_dE_fromLab.c
im_dECMC_fromLab.c
INCLUDES = -I${top_srcdir}/libvips/include @VIPS_CFLAGS@ @VIPS_INCLUDES@

173
libvips/colour/colour.c
View File

@ -396,6 +396,179 @@ vips_colour_code_init( VipsColourCode *code )
{
}
G_DEFINE_ABSTRACT_TYPE( VipsColourDifference, vips_colour_difference,
VIPS_TYPE_COLOUR );
static int
vips_colour_difference_build( VipsObject *object )
{
VipsColour *colour = VIPS_COLOUR( object );
VipsColourDifference *difference = VIPS_COLOUR_DIFFERENCE( object );
VipsColourDifferenceClass *class =
VIPS_COLOUR_DIFFERENCE_GET_CLASS( object );
VipsImage **t;
VipsImage *left;
VipsImage *right;
VipsImage *extra;
t = (VipsImage **) vips_object_local_array( object, 10 );
left = difference->left;
right = difference->right;
extra = NULL;
/* Unpack LABQ images,
*/
if( left &&
left->Coding == VIPS_CODING_LABQ ) {
if( vips_LabQ2Lab( left, &t[0], NULL ) )
return( -1 );
left = t[0];
}
if( right &&
right->Coding == VIPS_CODING_LABQ ) {
if( vips_LabQ2Lab( right, &t[1], NULL ) )
return( -1 );
right = t[1];
}
if( left &&
vips_check_uncoded( VIPS_OBJECT_CLASS( class )->nickname,
left ) )
return( -1 );
if( right &&
vips_check_uncoded( VIPS_OBJECT_CLASS( class )->nickname,
right ) )
return( -1 );
/* Detach and reattach extra bands, if any. If both left and right
* have extra bands, give up.
*/
if( left &&
left->Bands > 3 &&
right &&
right->Bands > 3 ) {
vips_error( VIPS_OBJECT_CLASS( class )->nickname,
"%s", "both images have extra bands" );
return( -1 );
}
if( left &&
left->Bands > 3 ) {
if( vips_extract_band( left, &t[2], 0,
"n", 3,
NULL ) )
return( -1 );
if( vips_extract_band( left, &t[3], 3,
"n", left->Bands - 3,
NULL ) )
return( -1 );
left = t[2];
extra = t[3];
}
if( right &&
right->Bands > 3 ) {
if( vips_extract_band( right, &t[4], 0,
"n", 3,
NULL ) )
return( -1 );
if( vips_extract_band( right, &t[5], 3,
"n", right->Bands - 3,
NULL ) )
return( -1 );
right = t[4];
extra = t[5];
}
if( vips_check_bands_atleast( VIPS_OBJECT_CLASS( class )->nickname,
left, 3 ) )
return( -1 );
if( vips_check_bands_atleast( VIPS_OBJECT_CLASS( class )->nickname,
right, 3 ) )
return( -1 );
if( vips_colour_convert( left, &t[6],
difference->interpretation, NULL ) )
return( -1 );
left = t[6];
if( vips_colour_convert( right, &t[7],
difference->interpretation, NULL ) )
return( -1 );
right = t[7];
/* We only process float.
*/
if( vips_cast_float( left, &t[8], NULL ) )
return( -1 );
left = t[8];
if( vips_cast_float( right, &t[9], NULL ) )
return( -1 );
right = t[9];
colour->n = 2;
colour->in = (VipsImage **) vips_object_local_array( object, 2 );
colour->in[0] = left;
colour->in[1] = right;
if( colour->in[0] )
g_object_ref( colour->in[0] );
if( colour->in[1] )
g_object_ref( colour->in[1] );
if( VIPS_OBJECT_CLASS( vips_colour_space_parent_class )->
build( object ) )
return( -1 );
/* Reattach higher bands, if necessary.
*/
if( extra ) {
VipsImage *x;
if( vips_bandjoin2( colour->out, extra, &x, NULL ) )
return( -1 );
VIPS_UNREF( colour->out );
colour->out = x;
}
return( 0 );
}
static void
vips_colour_difference_class_init( VipsColourDifferenceClass *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 = "difference";
vobject_class->description = _( "calculate colour difference" );
vobject_class->build = vips_colour_difference_build;
VIPS_ARG_IMAGE( class, "left", 1,
_( "Left" ),
_( "Left-hand input image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourDifference, left ) );
VIPS_ARG_IMAGE( class, "right", 2,
_( "Right" ),
_( "Right-hand input image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourDifference, right ) );
}
static void
vips_colour_difference_init( VipsColourDifference *difference )
{
}
/* A colour-transforming function.
*/
typedef int (*VipsColourTransformFn)( VipsImage *in, VipsImage **out, ... );

37
libvips/colour/colour.h
View File

@ -163,6 +163,43 @@ typedef struct _VipsColourCodeClass {
GType vips_colour_code_get_type( void );
/* Difference between two colour images.
*/
#define VIPS_TYPE_COLOUR_DIFFERENCE (vips_colour_difference_get_type())
#define VIPS_COLOUR_DIFFERENCE( obj ) \
(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
VIPS_TYPE_COLOUR_DIFFERENCE, VipsColourDifference ))
#define VIPS_COLOUR_DIFFERENCE_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_CAST( (klass), \
VIPS_TYPE_COLOUR_DIFFERENCE, VipsColourDifferenceClass))
#define VIPS_IS_COLOUR_DIFFERENCE( obj ) \
(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_COLOUR_DIFFERENCE ))
#define VIPS_IS_COLOUR_DIFFERENCE_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_COLOUR_DIFFERENCE ))
#define VIPS_COLOUR_DIFFERENCE_GET_CLASS( obj ) \
(G_TYPE_INSTANCE_GET_CLASS( (obj), \
VIPS_TYPE_COLOUR_DIFFERENCE, VipsColourDifferenceClass ))
typedef struct _VipsColourDifference {
VipsColour parent_instance;
VipsImage *left;
VipsImage *right;
/* Both get converted to this space.
*/
VipsInterpretation interpretation;
} VipsColourDifference;
typedef struct _VipsColourDifferenceClass {
VipsColourClass parent_class;
} VipsColourDifferenceClass;
GType vips_colour_difference_get_type( void );
#ifdef __cplusplus
}
#endif /*__cplusplus*/

6
libvips/colour/colour_funcs.c
View File

@ -68,7 +68,7 @@
#include <vips/internal.h>
/**
* im_col_pythagoras:
* vips_pythagoras:
* @L1: Input coordinate 1
* @a1: Input coordinate 1
* @b1: Input coordinate 1
@ -79,13 +79,13 @@
* Pythagorean distance between two points in colour space. Lab/XYZ/UCS etc.
*/
float
im_col_pythagoras( float L1, float a1, float b1, float L2, float a2, float b2 )
vips_pythagoras( float L1, float a1, float b1, float L2, float a2, float b2 )
{
float dL = L1 - L2;
float da = a1 - a2;
float db = b1 - b2;
return( sqrt( dL*dL + da*da + db*db ) );
return( sqrt( dL * dL + da * da + db * db ) );
}
/* Functions to convert from Lab to uniform colour space and back.

70
libvips/colour/im_dE_fromLab.c → libvips/colour/dE76.c
View File

@ -6,6 +6,8 @@
* 31/10/09
* - use im__colour_binary()
* - gtkdoc comment
* 25/10/12
* - redone as a class
*/
/*
@ -40,19 +42,32 @@
#include <vips/intl.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include <vips/debug.h>
#include "colour.h"
typedef struct _VipsdE76 {
VipsColourDifference parent_instance;
} VipsdE76;
typedef VipsColourSpaceClass VipsdE76Class;
G_DEFINE_TYPE( VipsdE76, vips_dE76, VIPS_TYPE_COLOUR_DIFFERENCE );
/* Find the difference between two buffers of LAB data.
*/
void
imb_dE_fromLab( float **p, float *q, int n )
static void
vips_dE76_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
{
float *p1 = p[0];
float *p2 = p[1];
float *p1 = (float *) in[0];
float *p2 = (float *) in[1];
float *q = (float *) out;
int x;
for( x = 0; x < n; x++ ) {
q[x] = im_col_pythagoras(
for( x = 0; x < width; x++ ) {
q[x] = vips_pythagoras(
p1[0], p1[1], p1[2], p2[0], p2[1], p2[2] );
p1 += 3;
@ -60,20 +75,41 @@ imb_dE_fromLab( float **p, float *q, int n )
}
}
static void
vips_dE76_class_init( VipsdE76Class *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
object_class->nickname = "dE76";
object_class->description = _( "calculate dE76" );
colour_class->process_line = vips_dE76_line;
}
static void
vips_dE76_init( VipsdE76 *dE76 )
{
}
/**
* im_dE_fromLab:
* @in1: first input image
* @in2: second input image
* vips_dE76:
* @in: input image
* @out: output image
*
* Calculate CIE dE 1976 from two Lab images.
* Calculate dE 76.
*
* Returns: 0 on success, -1 on error.
* Returns: 0 on success, -1 on error
*/
int
im_dE_fromLab( IMAGE *in1, IMAGE *in2, IMAGE *out )
int
vips_dE76( VipsImage *left, VipsImage *right, VipsImage **out, ... )
{
return( im__colour_difference( "im_dE_fromLab",
in1, in2, out,
(im_wrapmany_fn) imb_dE_fromLab, NULL, NULL ) );
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "dE76", ap, left, right, out );
va_end( ap );
return( result );
}

17
libvips/deprecated/vips7compat.c
View File

@ -2773,3 +2773,20 @@ im_dE_fromXYZ( IMAGE *in1, IMAGE *in2, IMAGE *out )
return( 0 );
}
int
im_dE_fromLab( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
VipsImage *x;
if( vips_dE76( in1, in2, &x,
NULL ) )
return( -1 );
if( im_copy( x, out ) ) {
g_object_unref( x );
return( -1 );
}
g_object_unref( x );
return( 0 );
}

6
libvips/include/vips/colour.h
View File

@ -168,6 +168,9 @@ int vips_icc_export( VipsImage *in, VipsImage **out, ... )
int vips_icc_ac2rc( VipsImage *in, VipsImage *out,
const char *profile_filename );
int vips_dE76( VipsImage *left, VipsImage *right, VipsImage **out, ... )
__attribute__((sentinel));
void vips_col_Lab2XYZ( float L, float a, float b,
float *X, float *Y, float *Z );
void vips_col_XYZ2Lab( float X, float Y, float Z,
@ -193,7 +196,7 @@ int vips_col_sRGB2XYZ( int r, int g, int b, float *X, float *Y, float *Z );
/* Colour loading and conversion functions.
*/
float im_col_pythagoras( float L1, float a1, float b1,
float vips_pythagoras( float L1, float a1, float b1,
float L2, float a2, float b2 );
float im_col_dECMC(
@ -204,7 +207,6 @@ float im_col_dE00(
int im_dECMC_fromLab( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_dE00_fromLab( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_dE_fromXYZ( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_dE_fromLab( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_lab_morph( VipsImage *in, VipsImage *out,
DOUBLEMASK *mask,

3
libvips/include/vips/vips7compat.h
View File

@ -89,6 +89,7 @@ extern "C" {
#define im_col_L2Lucs vips_col_L2Lucs
#define im_col_C2Cucs vips_col_C2Cucs
#define im_col_Ch2hucs vips_col_Ch2hucs
#define im_col_pythagoras vips_pythagoras
#define im_col_make_tables_UCS vips_col_make_tables_UCS
#define im_col_Lucs2L vips_col_Lucs2L
@ -775,6 +776,8 @@ int im_UCS2Lab( VipsImage *in, VipsImage *out );
int im_Lab2UCS( VipsImage *in, VipsImage *out );
int im_XYZ2UCS( VipsImage *in, VipsImage *out );
int im_dE_fromLab( VipsImage *in1, VipsImage *in2, VipsImage *out );
/* ruby-vips uses this
*/
#define vips_class_map_concrete_all vips_class_map_all