1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2005-05-25
* Description : Oil Painting threaded image filter.
*
* Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
* Copyright (C) 2006-2007 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
*
* Original OilPaint algorithm copyrighted 2004 by
* Pieter Z. Voloshyn <pieter dot voloshyn at gmail dot com>.
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2, 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 General Public License for more details.
*
* ============================================================ */
// C++ includes.
#include <cmath>
#include <cstdlib>
// Local includes.
#include "ddebug.h"
#include "dimg.h"
#include "dimggaussianblur.h"
#include "dimgimagefilters.h"
#include "oilpaint.h"
namespace DigikamOilPaintImagesPlugin
{
OilPaint::OilPaint(Digikam::DImg *orgImage, TQObject *parent, int brushSize, int smoothness)
: Digikam::DImgThreadedFilter(orgImage, parent, "OilPaint")
{
m_brushSize = brushSize;
m_smoothness = smoothness;
initFilter();
}
void OilPaint::filterImage(void)
{
oilpaintImage(m_orgImage, m_destImage, m_brushSize, m_smoothness);
}
// This method have been ported from Pieter Z. Voloshyn algorithm code.
/* Function to apply the OilPaint effect.
*
* data => The image data in RGBA mode.
* w => Width of image.
* h => Height of image.
* BrushSize => Brush size.
* Smoothness => Smooth value.
*
* Theory => Using MostFrequentColor function we take the main color in
* a matrix and simply write at the original position.
*/
void OilPaint::oilpaintImage(Digikam::DImg &orgImage, Digikam::DImg &destImage, int BrushSize, int Smoothness)
{
int progress;
Digikam::DColor mostFrequentColor;
int w,h;
mostFrequentColor.setSixteenBit(orgImage.sixteenBit());
w = (int)orgImage.width();
h = (int)orgImage.height();
uchar *dest = destImage.bits();
int bytesDepth = orgImage.bytesDepth();
uchar *dptr;
// Allocate some arrays to be used.
// Do this here once for all to save a few million new / delete operations
m_intensityCount = new uchar[Smoothness + 1];
m_averageColorR = new uint[Smoothness + 1];
m_averageColorG = new uint[Smoothness + 1];
m_averageColorB = new uint[Smoothness + 1];
for (int h2 = 0; !m_cancel && (h2 < h); h2++)
{
for (int w2 = 0; !m_cancel && (w2 < w); w2++)
{
mostFrequentColor = MostFrequentColor(orgImage, w2, h2, BrushSize, Smoothness);
dptr = dest + w2*bytesDepth + (w*h2*bytesDepth);
mostFrequentColor.setPixel(dptr);
}
progress = (int) (((double)h2 * 100.0) / h);
if ( progress%5 == 0 )
postProgress( progress );
}
// free all the arrays
delete [] m_intensityCount;
delete [] m_averageColorR;
delete [] m_averageColorG;
delete [] m_averageColorB;
}
// This method have been ported from Pieter Z. Voloshyn algorithm code.
/* Function to determine the most frequent color in a matrix
*
* Bits => Bits array
* Width => Image width
* Height => Image height
* X => Position horizontal
* Y => Position vertical
* Radius => Is the radius of the matrix to be analized
* Intensity => Intensity to calcule
*
* Theory => This function creates a matrix with the analized pixel in
* the center of this matrix and find the most frequenty color
*/
Digikam::DColor OilPaint::MostFrequentColor(Digikam::DImg &src, int X, int Y, int Radius, int Intensity)
{
int i, w, h, I, Width, Height;
uint red, green, blue;
uchar *dest = src.bits();
int bytesDepth = src.bytesDepth();
uchar *sptr;
bool sixteenBit = src.sixteenBit();
Digikam::DColor mostFrequentColor;
double Scale = Intensity / (sixteenBit ? 65535.0 : 255.0);
Width = (int)src.width();
Height = (int)src.height();
// Erase the array
memset(m_intensityCount, 0, (Intensity + 1) * sizeof (uchar));
for (w = X - Radius; w <= X + Radius; w++)
{
for (h = Y - Radius; h <= Y + Radius; h++)
{
// This condition helps to identify when a point doesn't exist
if ((w >= 0) && (w < Width) && (h >= 0) && (h < Height))
{
sptr = dest + w*bytesDepth + (Width*h*bytesDepth);
Digikam::DColor color(sptr, sixteenBit);
red = (uint)color.red();
green = (uint)color.green();
blue = (uint)color.blue();
I = lround(GetIntensity (red, green, blue) * Scale);
m_intensityCount[I]++;
if (m_intensityCount[I] == 1)
{
m_averageColorR[I] = red;
m_averageColorG[I] = green;
m_averageColorB[I] = blue;
}
else
{
m_averageColorR[I] += red;
m_averageColorG[I] += green;
m_averageColorB[I] += blue;
}
}
}
}
I = 0;
int MaxInstance = 0;
for (i = 0 ; i <= Intensity ; i++)
{
if (m_intensityCount[i] > MaxInstance)
{
I = i;
MaxInstance = m_intensityCount[i];
}
}
// get Alpha channel value from original (unchanged)
mostFrequentColor = src.getPixelColor(X, Y);
// Overwrite RGB values to destination.
mostFrequentColor.setRed(m_averageColorR[I] / MaxInstance);
mostFrequentColor.setGreen(m_averageColorG[I] / MaxInstance);
mostFrequentColor.setBlue(m_averageColorB[I] / MaxInstance);
return mostFrequentColor;
}
} // NameSpace DigikamOilPaintImagesPlugin
|
