Fawkes API  Fawkes Development Version
sharpen.cpp
1 
2 /***************************************************************************
3  * sharpen.cpp - Implementation of the sharpen filter
4  *
5  * Created: Thu Jun 16 16:13:15 2005
6  * Copyright 2005-2012 Tim Niemueller [www.niemueller.de]
7  ****************************************************************************/
8 
9 /* This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version. A runtime exception applies to
13  * this software (see LICENSE.GPL_WRE file mentioned below for details).
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU Library General Public License for more details.
19  *
20  * Read the full text in the LICENSE.GPL_WRE file in the doc directory.
21  */
22 
23 #include <fvfilters/sharpen.h>
24 
25 #include <core/exception.h>
26 
27 #ifdef HAVE_IPP
28 # include <ippi.h>
29 #elif defined(HAVE_OPENCV)
30 # include <cv.h>
31 #else
32 # error "Neither IPP nor OpenCV available"
33 #endif
34 
35 namespace firevision {
36 #if 0 /* just to make Emacs auto-indent happy */
37 }
38 #endif
39 
40 /** @class FilterSharpen <fvfilters/sharpen.h>
41  * Sharpen filter.
42  * @author Tim Niemueller
43  */
44 
45 /** Constructor. */
46 FilterSharpen::FilterSharpen()
47  : Filter("FilterSharpen")
48 {
49 }
50 
51 
52 void
54 {
55 #if defined(HAVE_IPP)
56  IppiSize size;
57  size.width = src_roi[0]->width;
58  size.height = src_roi[0]->height;
59 
60  IppStatus status;
61 
62  // base + number of bytes to line y + pixel bytes
63  status = ippiFilterSharpen_8u_C1R( src[0] + (src_roi[0]->start.y * src_roi[0]->line_step) + (src_roi[0]->start.x * src_roi[0]->pixel_step), src_roi[0]->line_step,
65  size );
66 
67  if ( status != ippStsNoErr ) {
68  throw fawkes::Exception("Sharpen filter failed with %i\n", status);
69  }
70 #elif defined(HAVE_OPENCV)
71  if ((dst == NULL) || (dst == src[0])) {
72  throw fawkes::Exception("OpenCV-based Sobel filter cannot be in-place");
73  }
74 
75  cv::Mat srcm(src_roi[0]->height, src_roi[0]->width, CV_8UC1,
76  src[0] +
77  (src_roi[0]->start.y * src_roi[0]->line_step) +
78  (src_roi[0]->start.x * src_roi[0]->pixel_step),
79  src_roi[0]->line_step);
80 
81  cv::Mat dstm(dst_roi->height, dst_roi->width, CV_8UC1,
82  dst +
86 
87  cv::Mat kernel(3, 3, CV_32F);
88  float *kernel_f = (float *)kernel.ptr();
89  kernel_f[0] = -0.125; kernel_f[1] = -0.125; kernel_f[2] = -0.125;
90  kernel_f[3] = -0.125; kernel_f[4] = 2.0; kernel_f[5] = -0.125;
91  kernel_f[6] = -0.125; kernel_f[7] = -0.125; kernel_f[8] = -0.125;
92 
93  cv::Point kanchor(1, 1);
94 
95  cv::filter2D(srcm, dstm, /* ddepth */ -1, kernel, kanchor);
96 
97 #endif
98 
99 }
100 
101 } // end namespace firevision
fawkes::point_t start
ROI start.
Definition: roi.h:118
unsigned int x
x coordinate
Definition: types.h:35
unsigned int width
ROI width.
Definition: roi.h:120
virtual void apply()
Apply the filter.
Definition: sharpen.cpp:53
unsigned char ** src
Source buffers, dynamically allocated by Filter ctor.
Definition: filter.h:65
Base class for exceptions in Fawkes.
Definition: exception.h:36
Filter interface.
Definition: filter.h:35
unsigned int y
y coordinate
Definition: types.h:36
ROI ** src_roi
Source ROIs, dynamically allocated by Filter ctor.
Definition: filter.h:70
unsigned int height
ROI height.
Definition: roi.h:122
unsigned int line_step
line step
Definition: roi.h:128
unsigned char * dst
Destination buffer.
Definition: filter.h:67
unsigned int pixel_step
pixel step
Definition: roi.h:130
ROI * dst_roi
Destination ROI.
Definition: filter.h:72