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
34namespace firevision {
35
36/** @class FilterSharpen <fvfilters/sharpen.h>
37 * Sharpen filter.
38 * @author Tim Niemueller
39 */
40
41/** Constructor. */
43{
44}
45
46void
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),
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,
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