vips_buildlut() works, removing old im_buildlut()
This commit is contained in:
John Cupitt
parent
7ee47c2073
commit
9cc8204ce1
@ -38,7 +38,7 @@
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<xi:include href="xml/convolution.xml"/>
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<xi:include href="xml/foreign.xml"/>
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<xi:include href="xml/freq_filt.xml"/>
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<xi:include href="xml/histograms_lut.xml"/>
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<xi:include href="xml/histogram.xml"/>
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<xi:include href="xml/inplace.xml"/>
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<xi:include href="xml/interpolate.xml"/>
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<xi:include href="xml/morphology.xml"/>
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@ -60,8 +60,6 @@
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#include "pcreate.h"
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/* Our state.
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*/
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typedef struct _VipsBuildlut {
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VipsCreate parent_instance;
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@ -69,7 +67,7 @@ typedef struct _VipsBuildlut {
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*/
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VipsImage *in;
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/* Cast to a matrix.
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/* .. and cast to a matrix.
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*/
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VipsImage *mat;
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@ -253,7 +251,7 @@ vips_buildlut_class_init( VipsBuildlutClass *class )
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vobject_class->description = _( "build a look-up table" );
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vobject_class->build = vips_buildlut_build;
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VIPS_ARG_IMAGE( class, "in", 4,
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VIPS_ARG_IMAGE( class, "in", 0,
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_( "Input" ),
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_( "Matrix of XY coordinates" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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@ -2488,6 +2488,30 @@ im_fgrey( IMAGE *out, const int xsize, const int ysize )
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return( 0 );
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}
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int
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im_buildlut( DOUBLEMASK *input, VipsImage *out )
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{
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VipsImage *mat;
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VipsImage *x;
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mat = vips_image_new();
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if( im_mask2vips( input, mat ) )
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return( -1 );
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if( vips_buildlut( mat, &x,
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NULL ) ) {
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g_object_unref( mat );
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return( -1 );
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}
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g_object_unref( mat );
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if( im_copy( x, out ) ) {
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g_object_unref( x );
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return( -1 );
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}
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g_object_unref( x );
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return( 0 );
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}
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int
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im_rightshift_size( IMAGE *in, IMAGE *out,
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int xshift, int yshift, int band_fmt )
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@ -19,7 +19,6 @@ libhistogram_la_SOURCES = \
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im_invertlut.c \
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im_lhisteq.c \
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im_maplut.c \
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im_buildlut.c \
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im_project.c \
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im_stdif.c \
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tone.c
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@ -1,303 +0,0 @@
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/* Build a LUT from a set of x/y points.
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*
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* Written on: 26/9/06
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* - from im_invertlut()
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* 9/10/06
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* - don't output x values
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* 18/3/09
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* - saner limit and rounding behaviour
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* 30/3/09
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* - argh, fixed again
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* 22/6/09
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* - more fixes for tables that don't start at zero (thanks Jack)
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* 23/3/10
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* - gtkdoc
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/*
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <vips/vips.h>
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/* Our state.
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*/
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typedef struct _State {
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DOUBLEMASK *input; /* Input mask */
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int xlow; /* Index 0 in output is this x */
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int lut_size; /* Number of output elements to generate */
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double **data; /* Rows of unpacked matrix */
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double *buf; /* Ouput buffer */
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} State;
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/* Use this to sort our input rows by the first column.
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*/
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static int
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compare( const void *a, const void *b )
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{
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double **r1 = (double **) a;
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double **r2 = (double **) b;
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double diff = r1[0][0] - r2[0][0];
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if( diff > 0 )
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return( 1 );
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else if( diff == 0 )
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return( 0 );
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else
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return( -1 );
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}
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/* Free our state.
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*/
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static void
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free_state( State *state )
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{
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if( state->data ) {
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int i;
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for( i = 0; i < state->input->ysize; i++ )
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IM_FREE( state->data[i] );
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}
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IM_FREE( state->data );
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IM_FREE( state->buf );
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}
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/* Fill our state.
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*/
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static int
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build_state( State *state, DOUBLEMASK *input )
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{
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int x, y, i;
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int xlow, xhigh;
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state->input = input;
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state->data = NULL;
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/* Need xlow and xhigh to get the size of the LUT we build.
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*/
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xlow = xhigh = input->coeff[0];
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for( y = 0; y < input->ysize; y++ ) {
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double v = input->coeff[y * input->xsize];
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if( floor( v ) != v ) {
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im_error( "im_buildlut",
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"%s", _( "x value not an int" ) );
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return( -1 );
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}
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if( v < xlow )
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xlow = v;
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if( v > xhigh )
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xhigh = v;
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}
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state->xlow = xlow;
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state->lut_size = xhigh - xlow + 1;
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if( state->lut_size < 1 ) {
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im_error( "im_buildlut", "%s", _( "x range too small" ) );
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return( -1 );
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}
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if( !(state->data = IM_ARRAY( NULL, input->ysize, double * )) )
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return( -1 );
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for( y = 0; y < input->ysize; y++ )
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state->data[y] = NULL;
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for( y = 0; y < input->ysize; y++ )
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if( !(state->data[y] = IM_ARRAY( NULL, input->xsize, double )) )
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return( -1 );
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for( i = 0, y = 0; y < input->ysize; y++ )
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for( x = 0; x < input->xsize; x++, i++ )
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state->data[y][x] = input->coeff[i];
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if( !(state->buf = IM_ARRAY( NULL,
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state->lut_size * (input->xsize - 1), double )) )
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return( -1 );
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/* Sort by 1st column in input.
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*/
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qsort( state->data, input->ysize, sizeof( double * ), compare );
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#ifdef DEBUG
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printf( "Input table, sorted by 1st column\n" );
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for( y = 0; y < input->ysize; y++ ) {
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printf( "%.4d ", y );
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for( x = 0; x < input->xsize; x++ )
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printf( "%.9f ", state->data[y][x] );
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printf( "\n" );
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}
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#endif /*DEBUG*/
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return( 0 );
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}
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static int
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buildlut( State *state )
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{
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const int xlow = state->xlow;
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const DOUBLEMASK *input = state->input;
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const int ysize = input->ysize;
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const int xsize = input->xsize;
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const int bands = xsize - 1;
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const int xlast = state->data[ysize - 1][0];
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int b, i, x;
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/* Do each output channel separately.
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*/
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for( b = 0; b < bands; b++ ) {
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for( i = 0; i < ysize - 1; i++ ) {
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const int x1 = state->data[i][0];
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const int x2 = state->data[i + 1][0];
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const int dx = x2 - x1;
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const double y1 = state->data[i][b + 1];
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const double y2 = state->data[i + 1][b + 1];
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const double dy = y2 - y1;
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for( x = 0; x < dx; x++ )
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state->buf[b + (x + x1 - xlow) * bands] =
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y1 + x * dy / dx;
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}
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/* We are inclusive: pop the final value in by hand.
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*/
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state->buf[b + (xlast - xlow) * bands] =
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state->data[ysize - 1][b + 1];
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}
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return( 0 );
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}
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/**
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* im_buildlut:
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* @input: input mask
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* @output: output image
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*
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* This operation builds a lookup table from a set of points. Intermediate
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* values are generated by piecewise linear interpolation.
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*
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* For example, consider this 2 x 2 matrix of (x, y) coordinates:
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*
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* <tgroup cols='2' align='left' colsep='1' rowsep='1'>
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* <tbody>
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* <row>
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* <entry>0</entry>
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* <entry>0</entry>
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* </row>
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* <row>
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* <entry>255</entry>
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* <entry>100</entry>
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* </row>
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* </tbody>
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* </tgroup>
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*
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* We then generate:
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*
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* <tgroup cols='2' align='left' colsep='1' rowsep='1'>
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* <thead>
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* <row>
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* <entry>Index</entry>
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* <entry>Value</entry>
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* </row>
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* </thead>
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* <tbody>
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* <row>
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* <entry>0</entry>
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* <entry>0</entry>
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* </row>
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* <row>
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* <entry>1</entry>
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* <entry>0.4</entry>
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* </row>
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* <row>
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* <entry>...</entry>
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* <entry>etc. by linear interpolation</entry>
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* </row>
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* <row>
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* <entry>255</entry>
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* <entry>100</entry>
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* </row>
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* </tbody>
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* </tgroup>
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*
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* This is then written as the output image, with the left column giving the
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* index in the image to place the value.
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*
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* The (x, y) points don't need to be sorted: we do that. You can have
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* several Ys, each becomes a band in the output LUT. You don't need to
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* start at zero, any integer will do, including negatives.
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*
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* See also: im_identity(), im_invertlut().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_buildlut( DOUBLEMASK *input, IMAGE *output )
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{
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State state;
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if( !input || input->xsize < 2 || input->ysize < 1 ) {
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im_error( "im_buildlut", "%s", _( "bad input matrix size" ) );
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return( -1 );
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}
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if( build_state( &state, input ) ||
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buildlut( &state ) ) {
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free_state( &state );
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return( -1 );
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}
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im_initdesc( output,
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state.lut_size, 1, input->xsize - 1,
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IM_BBITS_DOUBLE, IM_BANDFMT_DOUBLE,
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IM_CODING_NONE, IM_TYPE_HISTOGRAM, 1.0, 1.0, 0, 0 );
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if( im_setupout( output ) ||
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im_writeline( 0, output, (VipsPel *) state.buf ) ) {
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free_state( &state );
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return( -1 );
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}
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free_state( &state );
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return( 0 );
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}
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@ -18,7 +18,7 @@ pkginclude_HEADERS = \
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inplace.h \
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generate.h \
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header.h \
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histograms_lut.h \
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histogram.h \
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freq_filt.h \
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image.h \
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interpolate.h \
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@ -31,8 +31,8 @@
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*/
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#ifndef IM_HIST_H
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#define IM_HIST_H
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#ifndef VIPS_HISTOGRAM_H
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#define VIPS_HISTOGRAM_H
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#ifdef __cplusplus
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extern "C" {
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@ -45,7 +45,6 @@ int im_hist_indexed( VipsImage *index, VipsImage *value, VipsImage *out );
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int im_identity( VipsImage *lut, int bands );
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int im_identity_ushort( VipsImage *lut, int bands, int sz );
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int im_invertlut( DOUBLEMASK *input, VipsImage *output, int lut_size );
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int im_buildlut( DOUBLEMASK *input, VipsImage *output );
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int im_project( VipsImage *in, VipsImage *hout, VipsImage *vout );
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int im_histnorm( VipsImage *in, VipsImage *out );
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@ -83,4 +82,4 @@ int im_tone_map( VipsImage *in, VipsImage *out, VipsImage *lut );
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}
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#endif /*__cplusplus*/
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#endif /*IM_HIST_H*/
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#endif /*VIPS_HISTOGRAM_H*/
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@ -129,7 +129,7 @@ extern "C" {
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#include <vips/convolution.h>
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#include <vips/morphology.h>
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#include <vips/mosaicing.h>
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#include <vips/histograms_lut.h>
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#include <vips/histogram.h>
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#include <vips/freq_filt.h>
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#include <vips/resample.h>
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#include <vips/colour.h>
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@ -733,6 +733,7 @@ int im_grey( VipsImage *out, const int xsize, const int ysize );
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int im_fgrey( VipsImage *out, const int xsize, const int ysize );
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int im_sines( VipsImage *out,
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int xsize, int ysize, double horfreq, double verfreq );
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int im_buildlut( DOUBLEMASK *input, VipsImage *output );
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int im_system( VipsImage *im, const char *cmd, char **out );
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VipsImage *im_system_image( VipsImage *im,
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