1 //! \example tutorial-autothreshold.cpp
2
3 #include <cstdlib>
4 #include <iostream>
5 #include <visp3/core/vpImage.h>
6 #include <visp3/gui/vpDisplayGDI.h>
7 #include <visp3/gui/vpDisplayOpenCV.h>
8 #include <visp3/gui/vpDisplayX.h>
9 #include <visp3/io/vpImageIo.h>
10
11 #if defined(VISP_HAVE_MODULE_IMGPROC)
12 //! [Include]
13 #include <visp3/imgproc/vpImgproc.h>
14 //! [Include]
15 #endif
16
main(int argc,const char ** argv)17 int main(int argc, const char **argv)
18 {
19 //! [Macro defined]
20 #if defined(VISP_HAVE_MODULE_IMGPROC) && (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV))
21 //! [Macro defined]
22 //!
23 std::string input_filename = "grid36-03.pgm";
24
25 for (int i = 1; i < argc; i++) {
26 if (std::string(argv[i]) == "--input" && i + 1 < argc) {
27 input_filename = std::string(argv[i + 1]);
28 } else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
29 std::cout << "Usage: " << argv[0] << " [--input <input image>] [--help]" << std::endl;
30 return EXIT_SUCCESS;
31 }
32 }
33
34 vpImage<unsigned char> I;
35 vpImageIo::read(I, input_filename);
36
37 vpImage<unsigned char> I_res(3 * I.getHeight(), 3 * I.getWidth());
38 I_res.insert(I, vpImagePoint(I.getHeight(), I.getWidth()));
39
40 #ifdef VISP_HAVE_X11
41 vpDisplayX d;
42 #elif defined(VISP_HAVE_GDI)
43 vpDisplayGDI d;
44 #elif defined(VISP_HAVE_OPENCV)
45 vpDisplayOpenCV d;
46 #endif
47 d.setDownScalingFactor(vpDisplay::SCALE_2);
48 d.init(I_res);
49
50 //! [Huang]
51 vpImage<unsigned char> I_huang = I;
52 vp::autoThreshold(I_huang, vp::AUTO_THRESHOLD_HUANG);
53 //! [Huang]
54 I_res.insert(I_huang, vpImagePoint());
55
56 //! [Intermodes]
57 vpImage<unsigned char> I_intermodes = I;
58 vp::autoThreshold(I_intermodes, vp::AUTO_THRESHOLD_INTERMODES);
59 //! [Intermodes]
60 I_res.insert(I_intermodes, vpImagePoint(0, I.getWidth()));
61
62 //! [IsoData]
63 vpImage<unsigned char> I_isodata = I;
64 vp::autoThreshold(I_isodata, vp::AUTO_THRESHOLD_ISODATA);
65 //! [IsoData]
66 I_res.insert(I_isodata, vpImagePoint(0, 2 * I.getWidth()));
67
68 //! [Mean]
69 vpImage<unsigned char> I_mean = I;
70 vp::autoThreshold(I_mean, vp::AUTO_THRESHOLD_MEAN);
71 //! [Mean]
72 I_res.insert(I_mean, vpImagePoint(I.getHeight(), 0));
73
74 //! [Otsu]
75 vpImage<unsigned char> I_otsu = I;
76 vp::autoThreshold(I_otsu, vp::AUTO_THRESHOLD_OTSU);
77 //! [Otsu]
78 I_res.insert(I_otsu, vpImagePoint(I.getHeight(), 2 * I.getWidth()));
79
80 //! [Triangle]
81 vpImage<unsigned char> I_triangle = I;
82 vp::autoThreshold(I_triangle, vp::AUTO_THRESHOLD_TRIANGLE);
83 //! [Triangle]
84 I_res.insert(I_triangle, vpImagePoint(2 * I.getHeight(), 0));
85
86 vpDisplay::display(I_res);
87
88 vpDisplay::displayText(I_res, 30, 20, "Huang", vpColor::red);
89 vpDisplay::displayText(I_res, 30, 20 + I.getWidth(), "Intermodes", vpColor::red);
90 vpDisplay::displayText(I_res, 30, 20 + 2 * I.getWidth(), "IsoData", vpColor::red);
91 vpDisplay::displayText(I_res, 30 + I.getHeight(), 20, "Mean", vpColor::red);
92 vpDisplay::displayText(I_res, 30 + I.getHeight(), 20 + I.getWidth(), "Original", vpColor::red);
93 vpDisplay::displayText(I_res, 30 + I.getHeight(), 20 + 2 * I.getWidth(), "Otsu", vpColor::red);
94 vpDisplay::displayText(I_res, 30 + 2 * I.getHeight(), 20, "Triangle", vpColor::red);
95
96 vpDisplay::flush(I_res);
97 vpDisplay::getClick(I_res);
98
99 return EXIT_SUCCESS;
100 #else
101 (void)argc;
102 (void)argv;
103 return 0;
104 #endif
105 }
106