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revise again 

seems to work on all test images now
This commit is contained in:
John Cupitt 2017-06-08 18:35:55 +01:00
parent 846e9bb798
commit 869f3dae04
14 changed files with 59 additions and 608 deletions
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3
ChangeLog
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@ -1,3 +1,6 @@
9/6/17 started 8.5.7
- better smartcrop
19/5/17 started 8.5.6
- tiff read with start page > 0 could break edge tiles or strips
- raise b64 limit to allow for huge profiles (thanks jaume)

70
libvips/conversion/smartcrop.c
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@ -6,6 +6,8 @@
* - first version, from sharp
* 14/3/17
* - revised attention smartcrop
* 8/6/17
* - revised again
*/
/*
@ -183,19 +185,6 @@ pythagoras( VipsSmartcrop *smartcrop, VipsImage *in, VipsImage **out )
return( 0 );
}
static int
view_image( VipsImage *image )
{
VipsArrayImage *array;
int result;
array = vips_array_image_new( &image, 1 );
result = vips_system( "nip2 %s", "in", array, NULL );
vips_area_unref( VIPS_AREA( array ) );
return( result );
}
static int
vips_smartcrop_attention( VipsSmartcrop *smartcrop,
VipsImage *in, int *left, int *top )
@ -208,19 +197,19 @@ vips_smartcrop_attention( VipsSmartcrop *smartcrop,
VipsImage **t = (VipsImage **)
vips_object_local_array( VIPS_OBJECT( smartcrop ), 24 );
double hshrink;
double vshrink;
double hscale;
double vscale;
double sigma;
double max;
int x_pos;
int y_pos;
/* Simple laplacian.
/* Simple edge detect.
*/
if( !(t[21] = vips_image_new_matrixv( 3, 3,
-1.0, -1.0, -1.0,
-1.0, 8.0, -1.0,
-1.0, -1.0, -1.0 )) )
0.0, -1.0, 0.0,
-1.0, 4.0, -1.0,
0.0, -1.0, 0.0 )) )
return( -1 );
/* Convert to XYZ and just use the first three bands.
@ -229,17 +218,16 @@ vips_smartcrop_attention( VipsSmartcrop *smartcrop,
vips_extract_band( t[0], &t[1], 0, "n", 3, NULL ) )
return( -1 );
/* Laplacian on Y.
/* Edge detect on Y.
*/
if( vips_extract_band( t[1], &t[2], 1, NULL ) ||
vips_conv( t[2], &t[3], t[21],
"precision", VIPS_PRECISION_INTEGER,
NULL ) ||
vips_linear1( t[3], &t[12], 2, 0, NULL ) )
vips_linear1( t[3], &t[4], 5.0, 0.0, NULL ) ||
vips_abs( t[4], &t[14], NULL ) )
return( -1 );
view_image( t[12] );
/* Look for skin colours. Taken from smartcrop.js.
*/
if(
@ -255,14 +243,21 @@ vips_smartcrop_attention( VipsSmartcrop *smartcrop,
/* Rescale to 100 - 0 score.
*/
vips_linear1( t[8], &t[13], -100.0, 100.0, NULL ) )
vips_linear1( t[8], &t[9], -100.0, 100.0, NULL ) ||
/* Ignore dark areas.
*/
vips_more_const1( t[2], &t[10], 5.0, NULL ) ||
!(t[11] = vips_image_new_from_image1( t[10], 0.0 )) ||
vips_ifthenelse( t[10], t[9], t[11], &t[15], NULL ) )
return( -1 );
/* Look for saturated areas.
*/
if( vips_colourspace( t[1], &t[10],
if( vips_colourspace( t[1], &t[12],
VIPS_INTERPRETATION_LCH, NULL ) ||
vips_extract_band( t[10], &t[11], 1, NULL ) )
vips_extract_band( t[12], &t[13], 1, NULL ) ||
vips_ifthenelse( t[10], t[13], t[11], &t[16], NULL ) )
return( -1 );
/* Sum, shrink, blur and find maxpos.
@ -272,23 +267,26 @@ vips_smartcrop_attention( VipsSmartcrop *smartcrop,
* area: how large an area we want to consider for the scoring
* function.
*/
hshrink = in->Xsize / 32.0;
vshrink = in->Ysize / 32.0;
sigma = sqrt( pow( smartcrop->width / hshrink, 2 ) +
pow( smartcrop->height / vshrink, 2 ) ) / 6;
if( vips_sum( &t[11], &t[14], 3, NULL ) ||
vips_shrink( t[14], &t[15], hshrink, vshrink, NULL ) ||
vips_gaussblur( t[15], &t[16], sigma, NULL ) ||
vips_max( t[16], &max, "x", &x_pos, "y", &y_pos, NULL ) )
hscale = 32.0 / in->Xsize;
vscale = 32.0 / in->Ysize;
sigma = sqrt( pow( smartcrop->width * hscale, 2 ) +
pow( smartcrop->height * vscale, 2 ) ) / 10;
if( vips_sum( &t[14], &t[17], 3, NULL ) ||
vips_resize( t[17], &t[18], hscale,
"vscale", vscale,
"kernel", VIPS_KERNEL_LINEAR,
NULL ) ||
vips_gaussblur( t[18], &t[19], sigma, NULL ) ||
vips_max( t[19], &max, "x", &x_pos, "y", &y_pos, NULL ) )
return( -1 );
/* Centre the crop over the max.
*/
*left = VIPS_CLIP( 0,
hshrink * x_pos - smartcrop->width / 2,
x_pos / hscale - smartcrop->width / 2,
in->Xsize - smartcrop->width );
*top = VIPS_CLIP( 0,
vshrink * y_pos - smartcrop->height / 2,
y_pos / vscale - smartcrop->height / 2,
in->Ysize - smartcrop->height );
return( 0 );

4
libvips/include/vips/private.h
View File

@ -187,6 +187,10 @@ int vips__init( const char *argv0 );
size_t vips__get_sizeof_vipsobject( void );
int vips_region_prepare_many( struct _VipsRegion **reg, VipsRect *r );
/* Handy for debugging.
*/
int vips__view_image( struct _VipsImage *image );
#ifdef __cplusplus
}
#endif /*__cplusplus*/

18
libvips/iofuncs/image.c
View File

@ -3552,3 +3552,21 @@ vips_band_format_iscomplex( VipsBandFormat format )
return( FALSE );
}
}
/* Handy for debugging: view an image in nip2.
*/
int
vips__view_image( VipsImage *image )
{
VipsArrayImage *array;
int result;
array = vips_array_image_new( &image, 1 );
result = vips_system( "nip2 %s",
"in", array,
"in-format", "%s.v",
NULL );
vips_area_unref( VIPS_AREA( array ) );
return( result );
}

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572
smartcrop/smartcrop.ws
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@ -1,572 +0,0 @@
<?xml version="1.0"?>
<root xmlns="http://www.vips.ecs.soton.ac.uk/nip/8.5.1">
<Workspace window_x="0" window_y="28" window_width="1920" window_height="1172" view="WORKSPACE_MODE_REGULAR" scale="1" offset="0" locked="false" lpane_position="100" lpane_open="false" rpane_position="400" rpane_open="false" local_defs="// private definitions for this tab&#10;" name="tab2" caption="Default empty tab" filename="/data/john/pics/smartcrop/smartcrop.ws">
<Column x="0" y="0" open="true" selected="false" sform="false" next="6" name="A" caption="load, downsize and LAB">
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<Vector/>
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<Row name="separable">
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<Row name="type">
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<Row name="rotate">
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<iImage image_left="0" image_top="0" image_mag="0" show_status="false" show_paintbox="false" show_convert="false" show_rulers="false" scale="0" offset="0" falsecolour="false" type="true"/>
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