| /* horizontal and vertical projection |
| * |
| * 20/4/06 |
| * - from im_histgr() |
| * 25/3/10 |
| * - gtkdoc |
| * - small celanups |
| */ |
| |
| /* |
| |
| 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <stdlib.h> |
| #include <string.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /* Accumulate a projection in one of these. |
| */ |
| typedef struct { |
| IMAGE *in; |
| IMAGE *hout; |
| IMAGE *vout; |
| void *columns; |
| void *rows; |
| } Project; |
| |
| /* For each input bandfmt, the type we accumulate pixels in. |
| */ |
| static int project_type[] = { |
| IM_BANDFMT_UINT, /* IM_BANDFMT_UCHAR */ |
| IM_BANDFMT_INT, /* IM_BANDFMT_CHAR */ |
| IM_BANDFMT_UINT, /* IM_BANDFMT_USHORT */ |
| IM_BANDFMT_INT, /* IM_BANDFMT_SHORT */ |
| IM_BANDFMT_UINT, /* IM_BANDFMT_UINT */ |
| IM_BANDFMT_INT, /* IM_BANDFMT_INT */ |
| IM_BANDFMT_DOUBLE, /* IM_BANDFMT_FLOAT */ |
| IM_BANDFMT_NOTSET, /* IM_BANDFMT_COMPLEX */ |
| IM_BANDFMT_DOUBLE, /* IM_BANDFMT_DOUBLE */ |
| IM_BANDFMT_NOTSET /* IM_BANDFMT_DPCOMPLEX */ |
| }; |
| |
| static Project * |
| project_new( IMAGE *in, IMAGE *hout, IMAGE *vout ) |
| { |
| Project *project; |
| int psize = IM_IMAGE_SIZEOF_PEL( hout ); |
| |
| if( !(project = IM_NEW( hout, Project )) ) |
| return( NULL ); |
| project->in = in; |
| project->hout = hout; |
| project->vout = vout; |
| project->columns = IM_ARRAY( hout, psize * in->Xsize, guchar ); |
| project->rows = IM_ARRAY( hout, psize * in->Ysize, guchar ); |
| if( !project->columns || !project->rows ) |
| return( NULL ); |
| |
| memset( project->columns, 0, psize * in->Xsize ); |
| memset( project->rows, 0, psize * in->Ysize ); |
| |
| return( project ); |
| } |
| |
| /* Build a sub-project, based on the main project. |
| */ |
| static void * |
| project_new_sub( IMAGE *out, void *a, void *b ) |
| { |
| Project *mproject = (Project *) a; |
| |
| return( project_new( mproject->in, mproject->hout, mproject->vout ) ); |
| } |
| |
| #define ADD_BUFFER( TYPE, Q, P, N ) { \ |
| TYPE *p = (TYPE *) (P); \ |
| TYPE *q = (TYPE *) (Q); \ |
| int n = (N); \ |
| int i; \ |
| \ |
| for( i = 0; i < n; i++ ) \ |
| q[i] += p[i]; \ |
| } |
| |
| /* Join a sub-project onto the main project. |
| */ |
| static int |
| project_merge( void *seq, void *a, void *b ) |
| { |
| Project *sproject = (Project *) seq; |
| Project *mproject = (Project *) a; |
| IMAGE *in = mproject->in; |
| IMAGE *out = mproject->hout; |
| int hsz = in->Xsize * in->Bands; |
| int vsz = in->Ysize * in->Bands; |
| |
| g_assert( sproject->hout == mproject->hout ); |
| g_assert( sproject->vout == mproject->vout ); |
| |
| /* Add on sub-data. |
| */ |
| switch( out->BandFmt ) { |
| case IM_BANDFMT_UINT: |
| ADD_BUFFER( guint, mproject->columns, sproject->columns, hsz ); |
| ADD_BUFFER( guint, mproject->rows, sproject->rows, vsz ); |
| break; |
| |
| case IM_BANDFMT_INT: |
| ADD_BUFFER( int, mproject->columns, sproject->columns, hsz ); |
| ADD_BUFFER( int, mproject->rows, sproject->rows, vsz ); |
| break; |
| |
| case IM_BANDFMT_DOUBLE: |
| ADD_BUFFER( double, mproject->columns, sproject->columns, hsz ); |
| ADD_BUFFER( double, mproject->rows, sproject->rows, vsz ); |
| break; |
| |
| default: |
| g_assert( 0 ); |
| } |
| |
| /* Blank out sub-project to make sure we can't add it again. |
| */ |
| memset( sproject->columns, 0, IM_IMAGE_SIZEOF_ELEMENT( out ) * hsz ); |
| memset( sproject->rows, 0, IM_IMAGE_SIZEOF_ELEMENT( out ) * vsz ); |
| |
| return( 0 ); |
| } |
| |
| /* Add an area of pixels. |
| */ |
| #define ADD_PIXELS( OUTTYPE, INTYPE ) { \ |
| OUTTYPE *rows; \ |
| OUTTYPE *columns; \ |
| INTYPE *p; \ |
| \ |
| rows = ((OUTTYPE *) project->rows) + to * nb; \ |
| for( y = 0; y < r->height; y++ ) { \ |
| columns = ((OUTTYPE *) project->columns) + le * nb; \ |
| p = (INTYPE *) IM_REGION_ADDR( reg, le, y + to ); \ |
| \ |
| for( x = 0; x < r->width; x++ ) { \ |
| for( z = 0; z < nb; z++ ) { \ |
| columns[z] += p[z]; \ |
| rows[z] += p[z]; \ |
| } \ |
| \ |
| p += nb; \ |
| columns += nb; \ |
| } \ |
| \ |
| rows += nb; \ |
| } \ |
| } |
| |
| /* Add a region to a project. |
| */ |
| static int |
| project_scan( REGION *reg, void *seq, void *a, void *b ) |
| { |
| Project *project = (Project *) seq; |
| Rect *r = ®->valid; |
| int le = r->left; |
| int to = r->top; |
| int nb = project->in->Bands; |
| int x, y, z; |
| |
| switch( project->in->BandFmt ) { |
| case IM_BANDFMT_UCHAR: |
| ADD_PIXELS( guint, guchar ); |
| break; |
| |
| case IM_BANDFMT_CHAR: |
| ADD_PIXELS( int, char ); |
| break; |
| |
| case IM_BANDFMT_USHORT: |
| ADD_PIXELS( guint, gushort ); |
| break; |
| |
| case IM_BANDFMT_SHORT: |
| ADD_PIXELS( int, short ); |
| break; |
| |
| case IM_BANDFMT_UINT: |
| ADD_PIXELS( guint, guint ); |
| break; |
| |
| case IM_BANDFMT_INT: |
| ADD_PIXELS( int, int ); |
| break; |
| |
| case IM_BANDFMT_FLOAT: |
| ADD_PIXELS( double, float ); |
| break; |
| |
| case IM_BANDFMT_DOUBLE: |
| ADD_PIXELS( double, double ); |
| break; |
| |
| default: |
| g_assert( 0 ); |
| } |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_project: |
| * @in: input image |
| * @hout: sums of rows |
| * @vout: sums of columns |
| * |
| * Find the horizontal and vertical projections of an image, ie. the sum |
| * of every row of pixels, and the sum of every column of pixels. The output |
| * format is uint, int or double, depending on the input format. |
| * |
| * Non-complex images only. |
| * |
| * See also: im_histgr(), im_profile(). |
| * |
| * Returns: 0 on success, -1 on error |
| */ |
| int |
| im_project( IMAGE *in, IMAGE *hout, IMAGE *vout ) |
| { |
| Project *mproject; |
| int y; |
| |
| /* Check images. PIO from in, WIO to out. |
| */ |
| if( im_check_uncoded( "im_project", in ) || |
| im_check_noncomplex( "im_project", in ) || |
| im_pincheck( in ) || |
| im_outcheck( hout ) || |
| im_outcheck( vout ) ) |
| return( -1 ); |
| |
| /* Make the output images. |
| */ |
| if( im_cp_desc( hout, in ) || |
| im_cp_desc( vout, in ) ) |
| return( -1 ); |
| hout->Xsize = 1; |
| hout->BandFmt = project_type[in->BandFmt]; |
| hout->Type = IM_TYPE_HISTOGRAM; |
| vout->Ysize = 1; |
| vout->BandFmt = project_type[in->BandFmt]; |
| vout->Type = IM_TYPE_HISTOGRAM; |
| |
| /* Build the main project we accumulate data in. |
| */ |
| if( !(mproject = project_new( in, hout, vout )) ) |
| return( -1 ); |
| |
| /* Accumulate data. |
| */ |
| if( vips_sink( in, |
| project_new_sub, project_scan, project_merge, mproject, NULL ) ) |
| return( -1 ); |
| |
| if( im_setupout( hout ) || |
| im_setupout( vout ) ) |
| return( -1 ); |
| |
| if( im_writeline( 0, vout, (PEL *) mproject->columns ) ) |
| return( -1 ); |
| for( y = 0; y < in->Ysize; y++ ) |
| if( im_writeline( y, hout, (PEL *) mproject->rows + |
| y * IM_IMAGE_SIZEOF_PEL( hout ) ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
