Skip to content
GitLab
Commit d429a944 authored by Sven Neumann's avatar Sven Neumann Committed by Sven Neumann
Browse files

app/core/Makefile.am moved cpercep from here ... 

2005-07-28  Sven Neumann  <sven@gimp.org>

	* app/core/Makefile.am
	* app/core/cpercep.[ch]: moved cpercep from here ...

	* app/base/Makefile.am
	* app/base/cpercep.[ch]: ... to here.

	* app/base/siox.[ch]: use the cpercep routines for RGB->LAB
	conversion, gives a 20% speedup. Removed normalization which seems
	redundant. Make it work for grayscale and indexed, not only RGB.

	* app/core/gimpdrawable-foreground-extract.c
	* app/core/gimpimage-convert.c: changed accordingly.
parent 5ef2b855
Hide whitespace changes
Inline Side-by-side
ChangeLog
View file @ d429a944
2005-07-28 Sven Neumann <sven@gimp.org>
* app/core/Makefile.am
* app/core/cpercep.[ch]: moved cpercep from here ...
* app/base/Makefile.am
* app/base/cpercep.[ch]: ... to here.
* app/base/siox.[ch]: use the cpercep routines for RGB->LAB
conversion, gives a 20% speedup. Removed normalization which seems
redundant. Make it work for grayscale and indexed, not only RGB.
* app/core/gimpdrawable-foreground-extract.c
* app/core/gimpimage-convert.c: changed accordingly.
2005-07-26 Sven Neumann <sven@gimp.org>
* plug-ins/ifscompose/ifscompose.c: change the cursor with the tool
......
app/base/Makefile.am
View file @ d429a944
......@@ -16,6 +16,8 @@ libappbase_a_SOURCES = \
color-balance.h \
colorize.c \
colorize.h \
cpercep.c \
cpercep.h \
curves.c \
curves.h \
cpu-accel.c \
......
app/base/cpercep.c
View file @ d429a944
......@@ -54,17 +54,19 @@ from the Author.
TODO: document functions, rename erroneously-named arguments
*/
#include <stdlib.h>
#include <math.h>
#include "config.h"
#include <glib-object.h>
#include <libgimpmath/gimpmath.h>
#ifndef __GLIBC__
/* cbrt() is a GNU extension */
#define cbrt(x) (pow(x, 1.0/3.0))
#endif
#ifdef GIMP_COMPILATION
#include <glib.h> /* to get working 'inline' */
#endif
#include "cpercep.h"
/* defines:
......@@ -86,15 +88,13 @@ from the Author.
#define SRGB
#include "cpercep.h"
#ifdef SRGB
#define ASSUMED_GAMMA (2.2F)
#else
/*#define ASSUMED_GAMMA (2.591F)*/
#define ASSUMED_GAMMA (2.2F)
#endif
#define REV_GAMMA ((1.0F / ASSUMED_GAMMA))
......
app/base/siox.c
View file @ d429a944
......@@ -44,20 +44,28 @@
#include "paint-funcs/paint-funcs.h"
#include "cpercep.h"
#include "pixel-region.h"
#include "siox.h"
#include "tile-manager.h"
/* thresholds in the the mask, pixels < LOW are known background,
* pixels > HIGH are known foreground
*/
#define LOW 1
#define HIGH 254
/* Simulate a java.util.ArrayList */
/* These methods are NOT generic */
typedef struct
{
float l;
float a;
float b;
int cardinality;
gfloat l;
gfloat a;
gfloat b;
gint cardinality;
} lab;
typedef struct _ArrayList ArrayList;
......@@ -110,7 +118,7 @@ list_size (ArrayList *list)
static lab *
list_to_array (ArrayList *list,
int *returnlength)
gint *returnlength)
{
ArrayList *cur = list;
gint i = 0;
......@@ -152,80 +160,61 @@ free_list (ArrayList *list)
/* FIXME: try to use cpersep conversion here, should be faster */
static void
calcLAB (const guchar *src,
lab *pixel)
calc_lab (const guchar *src,
gint bpp,
const guchar *colormap,
lab *pixel)
{
gfloat r = src[RED_PIX] / 255.0;
gfloat g = src[GREEN_PIX] / 255.0;
gfloat b = src[BLUE_PIX] / 255.0;
gfloat x, y, z;
if (r > 0.04045)
r = (float) pow ((r + 0.055) / 1.055, 2.4);
else
r = r / 12.92;
if (g > 0.04045)
g = (float) pow ((g + 0.055) / 1.055, 2.4);
else
g = g / 12.92;
if (b > 0.04045)
b = (float) pow ((b + 0.055) / 1.055, 2.4);
else
b = b / 12.92;
gdouble l, a, b;
r = r * 100.0;
g = g * 100.0;
b = b * 100.0;
/* Observer. = 2°, Illuminant = D65 */
x = (float) (r * 0.4124 + g * 0.3576 + b * 0.1805) / 95.047;
y = (float) (r * 0.2126 + g * 0.7152 + b * 0.0722) / 100.0;
z = (float) (r * 0.0193 + g * 0.1192 + b * 0.9505) / 108.883;
if (x > 0.008856)
x = (float) pow (x, (1.0 / 3));
else
x = (7.787 * x) + (16.0 / 116);
if (y > 0.008856)
y = (float) pow (y, (1.0 / 3));
else
y = (7.787 * y) + (16.0 / 116);
switch (bpp)
{
case 3: /* RGB */
case 4: /* RGBA */
cpercep_rgb_to_space (src[RED_PIX],
src[GREEN_PIX],
src[BLUE_PIX], &l, &a, &b);
break;
case 2:
case 1:
if (colormap) /* INDEXED(A) */
{
gint i = *src * 3;
if (z > 0.008856)
z = (float) pow (z, (1.0 / 3));
else
z = (7.787 * z) + (16.0 / 116);
cpercep_rgb_to_space (colormap[i + RED_PIX],
colormap[i + GREEN_PIX],
colormap[i + BLUE_PIX], &l, &a, &b);
}
else /* GRAY(A) */
{
/* FIXME: there should be cpercep_gray_to_space */
cpercep_rgb_to_space (*src, *src, *src, &l, &a, &b);
}
break;
pixel->l = (116 * y) - 16;
pixel->a = 500 * (x - y);
pixel->b = 200 * (y - z);
}
default:
g_return_if_reached ();
}
#if 0
static float cie_f (float t)
{
return t > 0.008856 ? (1 / 3.0) : 7.787 * t + 16.0 / 116.0;
pixel->l = l;
pixel->a = a;
pixel->b = b;
}
#endif
/* Stage one of modified KD-Tree algorithm */
static void
stageone (lab *points,
int dims,
int depth,
ArrayList *clusters,
float limits[SIOX_DIMS],
int length)
stageone (lab *points,
gint dims,
gint depth,
ArrayList *clusters,
const gfloat limits[SIOX_DIMS],
gint length)
{
int curdim = depth % dims;
float min, max;
/* find maximum and minimum */
int i, countsm, countgr, smallc, bigc;
float pivotvalue, curval;
gint curdim = depth % dims;
gfloat min, max;
gint i, countsm, countgr, smallc, bigc;
gfloat pivotvalue, curval;
lab *smallerpoints;
lab *biggerpoints;
......@@ -332,24 +321,23 @@ stageone (lab *points,
* differences => not integrated into method stageone()
*/
static void
stagetwo (lab *points,
int dims,
int depth,
ArrayList *clusters,
float limits[SIOX_DIMS],
int length,
int total,
float threshold)
stagetwo (lab *points,
gint dims,
gint depth,
ArrayList *clusters,
const gfloat limits[SIOX_DIMS],
gint length,
gint total,
gfloat threshold)
{
int curdim = depth % dims;
float min, max;
/* find maximum and minimum */
int i, countsm, countgr, smallc, bigc;
float pivotvalue, curval;
int sum;
lab *point;
lab *smallerpoints;
lab *biggerpoints;
gint curdim = depth % dims;
gfloat min, max;
gint i, countsm, countgr, smallc, bigc;
gfloat pivotvalue, curval;
gint sum;
lab *point;
lab *smallerpoints;
lab *biggerpoints;
if (length < 1)
return;
......@@ -385,7 +373,8 @@ stagetwo (lab *points,
{
pivotvalue = ((max - min) / 2.0) + min;
/* g_printerr ("max=%f min=%f pivot=%f\n",max,min,pivotvalue); */
/* g_printerr ("max=%f min=%f pivot=%f\n", max, min, pivotvalue); */
countsm = 0;
countgr = 0;
......@@ -491,10 +480,10 @@ euklid (const lab p,
/* Creates a color signature for a given set of pixels */
static lab *
create_signature (lab *input,
int length,
float limits[SIOX_DIMS],
int *returnlength)
create_signature (lab *input,
gint length,
const gfloat limits[SIOX_DIMS],
gint *returnlength)
{
ArrayList *clusters1;
ArrayList *clusters2;
......@@ -561,47 +550,6 @@ create_signature (lab *input,
return rval;
}
static void
normalize_mask (TileManager *mask,
gint x,
gint y,
gint width,
gint height)
{
PixelRegion region;
gpointer pr;
gint row, col;
guchar max = 0;
pixel_region_init (&region, mask, x, y, width, height, FALSE);
for (pr = pixel_regions_register (1, &region);
pr != NULL;
pr = pixel_regions_process (pr))
{
guchar *data = region.data;
for (row = 0; row < region.h; row++)
{
guchar *d = data;
for (col = 0; col < region.w; col++, d++)
{
if (*d > max)
max = *d;
}
data += region.rowstride;
}
}
if (max == 255)
return;
g_printerr ("max = %d (need to actually implement normalize ?)\n", max);
/* TODO (or not TODO) */
}
static void
threshold_mask (TileManager *mask,
gint x,
......@@ -786,9 +734,9 @@ find_max_blob (TileManager *mask,
/* Returns squared clustersize */
static gfloat
getclustersize (const float limits[SIOX_DIMS])
getclustersize (const gfloat limits[SIOX_DIMS])
{
float sum = (limits[0] - (-limits[0])) * (limits[0] - (-limits[0]));
gfloat sum = (limits[0] - (-limits[0])) * (limits[0] - (-limits[0]));
sum += (limits[1] - (-limits[1])) * (limits[1] - (-limits[1]));
sum += (limits[2] - (-limits[2])) * (limits[2] - (-limits[2]));
......@@ -800,6 +748,7 @@ getclustersize (const float limits[SIOX_DIMS])
/**
* siox_foreground_extract:
* @pixels: the tiles to extract the foreground from
* @colormap: colormap in case @pixels are indexed, %NULL otherwise
* @mask: a trimap indicating sure foreground, sure background and
* undecided regions
* @limits: a three dimensional float array specifing the accuracy,
......@@ -810,39 +759,38 @@ getclustersize (const float limits[SIOX_DIMS])
*/
void
siox_foreground_extract (TileManager *pixels,
const guchar *colormap,
TileManager *mask,
gfloat limits[SIOX_DIMS],
const gfloat limits[SIOX_DIMS],
gint smoothness)
{
gfloat clustersize = getclustersize (limits);
gint surebgcount = 0;
gint surefgcount = 0;
gint i, j;
gint bgsiglen, fgsiglen;
lab *surebg;
lab *surefg;
lab *bgsig;
lab *fgsig;
PixelRegion srcPR;
PixelRegion mapPR;
gpointer pr;
gint width, height;
gint bpp;
gint row, col;
gfloat clustersize = getclustersize (limits);
gint surebgcount = 0;
gint surefgcount = 0;
gint i, j;
gint bgsiglen, fgsiglen;
lab *surebg;
lab *surefg;
lab *bgsig;
lab *fgsig;
g_return_if_fail (pixels != NULL);
g_return_if_fail (mask != NULL && tile_manager_bpp (mask) == 1);
width = tile_manager_width (pixels);
height = tile_manager_height (pixels);
bpp = tile_manager_bpp (pixels);
/* FIXME: handle grayscale and indexed images */
g_return_if_fail (bpp == 3 || bpp == 4);
g_return_if_fail (tile_manager_width (mask) == width);
g_return_if_fail (tile_manager_height (mask) == height);
cpercep_init ();
/* count given foreground and background pixels */
pixel_region_init (&mapPR, mask, 0, 0, width, height, FALSE);
......@@ -858,9 +806,9 @@ siox_foreground_extract (TileManager *pixels,
for (col = 0; col < mapPR.w; col++, m++)
{
if (*m < 32)
if (*m < LOW)
surebgcount++;
else if (*m > 224)
else if (*m > HIGH)
surefgcount++;
}
......@@ -874,6 +822,8 @@ siox_foreground_extract (TileManager *pixels,
i = 0;
j = 0;
bpp = tile_manager_bpp (pixels);
/* create inputs for colorsignatures */
pixel_region_init (&srcPR, pixels, 0, 0, width, height, FALSE);
pixel_region_init (&mapPR, mask, 0, 0, width, height, FALSE);
......@@ -892,14 +842,14 @@ siox_foreground_extract (TileManager *pixels,
for (col = 0; col < srcPR.w; col++, m++, s += bpp)
{
if (*m < 32)
if (*m < LOW)
{
calcLAB (s, surebg + i);
calc_lab (s, bpp, colormap, surebg + i);
i++;
}
else if (*m > 224)
else if (*m > HIGH)
{
calcLAB (s, surefg + j);
calc_lab (s, bpp, colormap, surefg + j);
j++;
}
}
......@@ -909,7 +859,7 @@ siox_foreground_extract (TileManager *pixels,
}
}
/* Create color signature for bg */
/* Create color signature for the background */
bgsig = create_signature (surebg, surebgcount, limits, &bgsiglen);
g_free (surebg);
......@@ -919,7 +869,7 @@ siox_foreground_extract (TileManager *pixels,
return;
}
/* Create color signature for fg */
/* Create color signature for the foreground */
fgsig = create_signature (surefg, surefgcount, limits, &fgsiglen);
g_free (surefg);
......@@ -945,10 +895,10 @@ siox_foreground_extract (TileManager *pixels,
gboolean background = FALSE;
gfloat min, d;
if (*m < 32 || *m > 224)
if (*m < LOW || *m > HIGH)
continue;
calcLAB (s, &labpixel);
calc_lab (s, bpp, colormap, &labpixel);
background = TRUE;
min = euklid (labpixel, bgsig[0]);
......@@ -996,8 +946,6 @@ siox_foreground_extract (TileManager *pixels,
/* Smooth a bit for error killing */
smooth_mask (mask, 0, 0, width, height);
normalize_mask (mask, 0, 0, width, height);
/* Now erode, to make sure only "strongly connected components"
* keep being connected
*/
......@@ -1010,8 +958,6 @@ siox_foreground_extract (TileManager *pixels,
for (i = 0; i < smoothness; i++)
smooth_mask (mask, 0, 0, width, height);
normalize_mask (mask, 0, 0, width, height);
/* Threshold the values */
threshold_mask (mask, 0, 0, width, height);
......
app/base/siox.h
View file @ d429a944
......@@ -41,9 +41,10 @@
#define SIOX_DIMS 3
void siox_foreground_extract (TileManager *tiles,
TileManager *trimap,
gfloat limits[SIOX_DIMS],
void siox_foreground_extract (TileManager *pixels,
const guchar *colormap,
TileManager *map,
const gfloat limits[SIOX_DIMS],
gint smoothness);
......
app/core/Makefile.am
View file @ d429a944
......@@ -2,7 +2,6 @@
AM_CPPFLAGS = \
-DG_LOG_DOMAIN=\"Gimp-Core\" \
-DGIMP_COMPILATION \
@GTHREAD_CFLAGS@
INCLUDES = \
......@@ -19,8 +18,6 @@ noinst_LIBRARIES = libappcore.a
libappcore_a_sources = \
core-enums.h \
core-types.h \
cpercep.c \
cpercep.h \
gimp.c \
gimp.h \
gimp-documents.c \
......
app/core/cpercep.c deleted 100644 → 0
View file @ 5ef2b855
/*
Copyright (C) 1999-2002 Adam D. Moss (the "Author"). All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is fur-
nished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the Author of the
Software shall not be used in advertising or otherwise to promote the sale,
use or other dealings in this Software without prior written authorization
from the Author.
*/
/*
cpercep.c: The CPercep Functions v0.9: 2002-02-10
Adam D. Moss: adam@gimp.org <http://www.foxbox.org/adam/code/cpercep/>
This code module concerns itself with conversion from a hard-coded
RGB colour space (sRGB by default) to CIE L*a*b* and back again with
(primarily) precision and (secondarily) speed, oriented largely
towards the purposes of quantifying the PERCEPTUAL difference between
two arbitrary RGB colours with a minimum of fuss.
Motivation One: The author is disheartened at the amount of graphics
processing software around which uses weighted or non-weighted
Euclidean distance between co-ordinates within a (poorly-defined) RGB
space as the basis of what should really be an estimate of perceptual
difference to the human eye. Certainly it's fast to do it that way,
but please think carefully about whether your particular application
should be tolerating sloppy results for the sake of real-time response.
Motivation Two: Lack of tested, re-usable and free code available
for this purpose. The difficulty in finding something similar to
CPercep with a free license motivated this project; I hope that this
code also serves to illustrate how to perform the
R'G'B'->XYZ->L*a*b*->XYZ->R'G'B' transformation correctly since I
was distressed to note how many of the equations and code snippets
on the net were omitting the reverse transform and/or were using
incorrectly-derived or just plain wrong constants.
TODO: document functions, rename erroneously-named arguments
*/
#include <stdlib.h>
#include <math.h>
#ifndef __GLIBC__
/* cbrt() is a GNU extension */
#define cbrt(x) (pow(x, 1.0/3.0))
#endif
#ifdef GIMP_COMPILATION
#include <glib.h> /* to get working 'inline' */
#endif
/* defines:
SANITY: emits warnings when passed non-sane colours (and usually
corrects them) -- useful when debugging.
APPROX: speeds up the conversion from RGB to the colourspace by
assuming that the RGB values passed in are integral and definitely
in the range 0->255
SRGB: assumes that the RGB values being passed in (and out) are
destined for an sRGB-alike display device (a typical modern monitor)
-- if you change this then you'll probably want to change ASSUMED_GAMMA,
the phosphor colours and the white point definition.
*/
/* #define SANITY */
#define APPROX
#define SRGB
#include "cpercep.h"
#ifdef SRGB
#define ASSUMED_GAMMA (2.2F)
#else
/*#define ASSUMED_GAMMA (2.591F)*/