Visual Servoing Platform version 3.5.0
tutorial-contrast-sharpening.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 = "Crayfish-low-contrast.png";
24 int blockRadius = 150;
25 int bins = 256;
26 float slope = 3.0f;
27 float sigma = 2.0f;
28 double weight = 0.5;
29
30 for (int i = 1; i < argc; i++) {
31 if (std::string(argv[i]) == "--input" && i + 1 < argc) {
32 input_filename = std::string(argv[i + 1]);
33 } else if (std::string(argv[i]) == "--blockRadius" && i + 1 < argc) {
34 blockRadius = atoi(argv[i + 1]);
35 } else if (std::string(argv[i]) == "--bins" && i + 1 < argc) {
36 bins = atoi(argv[i + 1]);
37 } else if (std::string(argv[i]) == "--slope" && i + 1 < argc) {
38 slope = (float)atof(argv[i + 1]);
39 } else if (std::string(argv[i]) == "--sigma" && i + 1 < argc) {
40 sigma = (float)atof(argv[i + 1]);
41 } else if (std::string(argv[i]) == "--weight" && i + 1 < argc) {
42 weight = atof(argv[i + 1]);
43 } else if (std::string(argv[i]) == "--help" || std::string(argv[i]) == "-h") {
44 std::cout << "Usage: " << argv[0]
45 << " [--input <input image>]"
46 " [--blockRadius <block radius for CLAHE>] "
47 " [--bins <nb histogram bins for CLAHE>] [--slope <slope for CLAHE>]"
48 " [--sigma <Gaussian kernel standard deviation>] [--weight <unsharp mask weighting>]"
49 " [--help] [-h]"
50 << std::endl;
51 return EXIT_SUCCESS;
52 }
53 }
54
56 vpImage<vpRGBa> I_color;
57 vpImageIo::read(I_color, input_filename);
59
60#ifdef VISP_HAVE_X11
61 vpDisplayX d, d2, d3, d4, d5, d6;
62#elif defined(VISP_HAVE_GDI)
63 vpDisplayGDI d, d2, d3, d4, d5, d6;
64#elif defined(VISP_HAVE_OPENCV)
65 vpDisplayOpenCV d, d2, d3, d4, d5, d6;
66#endif
67 d.init(I_color, 0, 0, "Input color image");
68
70 vpImage<vpRGBa> I_stretch;
71 vp::stretchContrast(I_color, I_stretch);
73 d2.init(I_stretch, I_color.getWidth(), 10, "Stretch contrast");
74
76 vpImage<vpRGBa> I_stretch_hsv;
77 vp::stretchContrastHSV(I_color, I_stretch_hsv);
79 d3.init(I_stretch_hsv, 0, I_color.getHeight() + 80, "Stretch contrast HSV");
80
82 vpImage<vpRGBa> I_hist_eq;
83 vp::equalizeHistogram(I_color, I_hist_eq);
85 d4.init(I_hist_eq, I_color.getWidth(), I_color.getHeight() + 80, "Histogram equalization");
86
88 vpImage<vpRGBa> I_clahe;
89 vp::clahe(I_color, I_clahe, blockRadius, bins, slope);
91 d5.init(I_clahe, 0, 2 * I_color.getHeight() + 80, "CLAHE");
92
94 vpImage<vpRGBa> I_unsharp;
95 vp::unsharpMask(I_clahe, I_unsharp, sigma, weight);
97 d6.init(I_unsharp, I_color.getWidth(), 2 * I_color.getHeight() + 80, "Unsharp mask");
98
99 vpDisplay::display(I_color);
100 vpDisplay::display(I_stretch);
101 vpDisplay::display(I_stretch_hsv);
102 vpDisplay::display(I_hist_eq);
103 vpDisplay::display(I_clahe);
104 vpDisplay::display(I_unsharp);
105 vpDisplay::displayText(I_unsharp, 20, 20, "Click to quit.", vpColor::red);
106 vpDisplay::flush(I_color);
107 vpDisplay::flush(I_stretch);
108 vpDisplay::flush(I_stretch_hsv);
109 vpDisplay::flush(I_hist_eq);
110 vpDisplay::flush(I_clahe);
111 vpDisplay::flush(I_unsharp);
112 vpDisplay::getClick(I_unsharp);
113
114 return EXIT_SUCCESS;
115#else
116 (void)argc;
117 (void)argv;
118 return 0;
119#endif
120}
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)
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
unsigned int getWidth() const
Definition: vpImage.h:246
unsigned int getHeight() const
Definition: vpImage.h:188
VISP_EXPORT void clahe(const vpImage< unsigned char > &I1, vpImage< unsigned char > &I2, int blockRadius=150, int bins=256, float slope=3.0f, bool fast=true)
Definition: vpCLAHE.cpp:228
VISP_EXPORT void stretchContrast(vpImage< unsigned char > &I)
Definition: vpImgproc.cpp:419
VISP_EXPORT void stretchContrastHSV(vpImage< vpRGBa > &I)
Definition: vpImgproc.cpp:556
VISP_EXPORT void equalizeHistogram(vpImage< unsigned char > &I)
Definition: vpImgproc.cpp:165
vp_deprecated VISP_EXPORT void unsharpMask(vpImage< unsigned char > &I, unsigned int size=7, double weight=0.6)
Definition: vpImgproc.cpp:719