Visual Servoing Platform version 3.5.0
tutorial-autothreshold.cpp
1
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)
13#include <visp3/imgproc/vpImgproc.h>
15#endif
16
17int main(int argc, const char **argv)
18{
20#if defined(VISP_HAVE_MODULE_IMGPROC) && (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV))
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
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)
44#elif defined(VISP_HAVE_OPENCV)
46#endif
48 d.init(I_res);
49
51 vpImage<unsigned char> I_huang = I;
54 I_res.insert(I_huang, vpImagePoint());
55
57 vpImage<unsigned char> I_intermodes = I;
60 I_res.insert(I_intermodes, vpImagePoint(0, I.getWidth()));
61
63 vpImage<unsigned char> I_isodata = I;
66 I_res.insert(I_isodata, vpImagePoint(0, 2 * I.getWidth()));
67
69 vpImage<unsigned char> I_mean = I;
72 I_res.insert(I_mean, vpImagePoint(I.getHeight(), 0));
73
75 vpImage<unsigned char> I_otsu = I;
78 I_res.insert(I_otsu, vpImagePoint(I.getHeight(), 2 * I.getWidth()));
79
81 vpImage<unsigned char> I_triangle = I;
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);
98
99 return EXIT_SUCCESS;
100#else
101 (void)argc;
102 (void)argv;
103 return 0;
104#endif
105}
static const vpColor red
Definition: vpColor.h:217
Display for windows using GDI (available on any windows 32 platform).
Definition: vpDisplayGDI.h:129
The vpDisplayOpenCV allows to display image using the OpenCV library. Thus to enable this class OpenC...
Use the X11 console to display images on unix-like OS. Thus to enable this class X11 should be instal...
Definition: vpDisplayX.h:135
void init(vpImage< unsigned char > &I, int win_x=-1, int win_y=-1, const std::string &win_title="")
static bool getClick(const vpImage< unsigned char > &I, bool blocking=true)
virtual void setDownScalingFactor(unsigned int scale)
Definition: vpDisplay.cpp:231
static void display(const vpImage< unsigned char > &I)
static void flush(const vpImage< unsigned char > &I)
static void displayText(const vpImage< unsigned char > &I, const vpImagePoint &ip, const std::string &s, const vpColor &color)
static void read(vpImage< unsigned char > &I, const std::string &filename, int backend=IO_DEFAULT_BACKEND)
Definition: vpImageIo.cpp:149
Class that defines a 2D point in an image. This class is useful for image processing and stores only ...
Definition: vpImagePoint.h:88
unsigned int getWidth() const
Definition: vpImage.h:246
unsigned int getHeight() const
Definition: vpImage.h:188
VISP_EXPORT unsigned char autoThreshold(vpImage< unsigned char > &I, const vp::vpAutoThresholdMethod &method, const unsigned char backgroundValue=0, const unsigned char foregroundValue=255)
@ AUTO_THRESHOLD_ISODATA
Definition: vpImgproc.h:67
@ AUTO_THRESHOLD_HUANG
Definition: vpImgproc.h:59
@ AUTO_THRESHOLD_INTERMODES
Definition: vpImgproc.h:63
@ AUTO_THRESHOLD_TRIANGLE
Definition: vpImgproc.h:79
@ AUTO_THRESHOLD_MEAN
Definition: vpImgproc.h:71
@ AUTO_THRESHOLD_OTSU
Definition: vpImgproc.h:75