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 <core/exception.h>
24 #include <fvfilters/sharpen.h>
25 
26 #ifdef HAVE_IPP
27 # include <ippi.h>
28 #elif defined(HAVE_OPENCV)
29 # include <opencv2/opencv.hpp>
30 #else
31 # error "Neither IPP nor OpenCV available"
32 #endif
33 
34 namespace firevision {
35 
36 /** @class FilterSharpen <fvfilters/sharpen.h>
37  * Sharpen filter.
38  * @author Tim Niemueller
39  */
40 
41 /** Constructor. */
43 {
44 }
45 
46 void
48 {
49 #if defined(HAVE_IPP)
50  IppiSize size;
51  size.width = src_roi[0]->width;
52  size.height = src_roi[0]->height;
53 
54  IppStatus status;
55 
56  // base + number of bytes to line y + pixel bytes
57  status = ippiFilterSharpen_8u_C1R(src[0] + (src_roi[0]->start.y * src_roi[0]->line_step)
58  + (src_roi[0]->start.x * src_roi[0]->pixel_step),
59  src_roi[0]->line_step,
63  size);
64 
65  if (status != ippStsNoErr) {
66  throw fawkes::Exception("Sharpen filter failed with %i\n", status);
67  }
68 #elif defined(HAVE_OPENCV)
69  if ((dst == NULL) || (dst == src[0])) {
70  throw fawkes::Exception("OpenCV-based Sobel filter cannot be in-place");
71  }
72 
73  cv::Mat srcm(src_roi[0]->height,
74  src_roi[0]->width,
75  CV_8UC1,
76  src[0] + (src_roi[0]->start.y * src_roi[0]->line_step)
77  + (src_roi[0]->start.x * src_roi[0]->pixel_step),
78  src_roi[0]->line_step);
79 
80  cv::Mat dstm(dst_roi->height,
81  dst_roi->width,
82  CV_8UC1,
86 
87  cv::Mat kernel(3, 3, CV_32F);
88  float * kernel_f = (float *)kernel.ptr();
89  kernel_f[0] = -0.125;
90  kernel_f[1] = -0.125;
91  kernel_f[2] = -0.125;
92  kernel_f[3] = -0.125;
93  kernel_f[4] = 2.0;
94  kernel_f[5] = -0.125;
95  kernel_f[6] = -0.125;
96  kernel_f[7] = -0.125;
97  kernel_f[8] = -0.125;
98 
99  cv::Point kanchor(1, 1);
100 
101  cv::filter2D(srcm, dstm, /* ddepth */ -1, kernel, kanchor);
102 
103 #endif
104 }
105 
106 } // end namespace firevision
Base class for exceptions in Fawkes.
Definition: exception.h:36
FilterSharpen()
Constructor.
Definition: sharpen.cpp:42
virtual void apply()
Apply the filter.
Definition: sharpen.cpp:47
Filter interface.
Definition: filter.h:33
ROI ** src_roi
Source ROIs, dynamically allocated by Filter ctor.
Definition: filter.h:66
unsigned char ** src
Source buffers, dynamically allocated by Filter ctor.
Definition: filter.h:61
unsigned char * dst
Destination buffer.
Definition: filter.h:63
ROI * dst_roi
Destination ROI.
Definition: filter.h:68
unsigned int height
ROI height.
Definition: roi.h:119
fawkes::upoint_t start
ROI start.
Definition: roi.h:115
unsigned int line_step
line step
Definition: roi.h:125
unsigned int width
ROI width.
Definition: roi.h:117
unsigned int pixel_step
pixel step
Definition: roi.h:127
unsigned int x
x coordinate
Definition: types.h:36
unsigned int y
y coordinate
Definition: types.h:37