Read an image sequence from the disk. The sequence is made of separate images. Each image corresponds to a PGM file. Display these images using X11 or GTK.
#include <stdlib.h>
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDebug.h>
#if (defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI))
#include <visp3/core/vpDisplay.h>
#include <visp3/core/vpImage.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/core/vpTime.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/io/vpDiskGrabber.h>
#include <visp3/io/vpParseArgv.h>
#define GETOPTARGS "b:de:f:i:hn:s:z:"
void usage(const char *name, const char *badparam, std::string ipath, std::string basename, std::string ext, int first,
unsigned int nimages, int step, unsigned int nzero);
bool getOptions(int argc, const char **argv, std::string &ipath, std::string &basename, std::string &ext, int &first,
unsigned int &nimages, int &step, unsigned int &nzero, bool &display);
void usage(const char *name, const char *badparam, std::string ipath, std::string basename, std::string ext, int first,
unsigned int nimages, int step, unsigned int nzero)
{
fprintf(stdout, "\n\
Read an image sequence from the disk. Display it using X11 or GTK.\n\
The sequence is made of separate images. Each image corresponds\n\
to a PGM file.\n\
\n\
SYNOPSIS\n\
%s [-i <input image path>] [-b <base name>] [-e <extension>] \n\
[-f <first frame>] [-n <number of images> [-s <step>] \n\
[-z <number of zero>] [-d] [-h]\n", name);
fprintf(stdout, "\n\
OPTIONS: Default\n\
-i <input image path> %s\n\
Set image input path.\n\
From this path read \"cube/image.%%04d.pgm\"\n\
images.\n\
Setting the VISP_INPUT_IMAGE_PATH environment\n\
variable produces the same behaviour than using\n\
this option.\n\
\n\
-b <base name> %s\n\
Specify the base name of the files of the sequence\n\
containing the images to process. \n\
By image sequence, we mean one file per image.\n\
The following image file formats PNM (PGM P5, PPM P6)\n\
are supported. The format is selected by analysing \n\
the filename extension.\n\
\n\
-e <extension> %s\n\
Specify the extension of the files.\n\
Not taken into account for the moment. Will be a\n\
future feature...\n\
\n\
-f <first frame> %d\n\
First frame number of the sequence\n\
\n\
-n <number of images> %u\n\
Number of images to load from the sequence.\n\
\n\
-s <step> %d\n\
Step between two images.\n\
\n\
-z <number of zero> %u\n\
Number of digits to encode the image number.\n\
\n\
-d \n\
Turn off the display.\n\
\n\
-h \n\
Print the help.\n\n", ipath.c_str(), basename.c_str(), ext.c_str(), first, nimages, step, nzero);
if (badparam)
fprintf(stdout, "\nERROR: Bad parameter [%s]\n", badparam);
}
bool getOptions(int argc, const char **argv, std::string &ipath, std::string &basename, std::string &ext, int &first,
unsigned int &nimages, int &step, unsigned int &nzero, bool &display)
{
const char *optarg_;
int c;
switch (c) {
case 'b':
basename = optarg_;
break;
case 'd':
display = false;
break;
case 'e':
ext = optarg_;
break;
case 'f':
first = atoi(optarg_);
break;
case 'i':
ipath = optarg_;
break;
case 'n':
nimages = (unsigned)atoi(optarg_);
break;
case 's':
step = atoi(optarg_);
break;
case 'z':
nzero = (unsigned)atoi(optarg_);
break;
case 'h':
usage(argv[0], NULL, ipath, basename, ext, first, nimages, step, nzero);
return false;
break;
default:
usage(argv[0], optarg_, ipath, basename, ext, first, nimages, step, nzero);
return false;
break;
}
}
if ((c == 1) || (c == -1)) {
usage(argv[0], NULL, ipath, basename, ext, first, nimages, step, nzero);
std::cerr << "ERROR: " << std::endl;
std::cerr << " Bad argument " << optarg_ << std::endl << std::endl;
return false;
}
return true;
}
int main(int argc, const char **argv)
{
try {
std::string env_ipath;
std::string opt_ipath;
std::string ipath;
std::string opt_basename = "cube/image.";
std::string opt_ext = "pgm";
bool opt_display = true;
int opt_first = 5;
unsigned int opt_nimages = 70;
int opt_step = 1;
unsigned int opt_nzero = 4;
if (!env_ipath.empty())
ipath = env_ipath;
if (getOptions(argc, argv, opt_ipath, opt_basename, opt_ext, opt_first, opt_nimages, opt_step, opt_nzero,
opt_display) == false) {
exit(-1);
}
if (!opt_ipath.empty())
ipath = opt_ipath;
if (!opt_ipath.empty() && !env_ipath.empty()) {
if (ipath != env_ipath) {
std::cout << std::endl << "WARNING: " << std::endl;
std::cout << " Since -i <visp image path=" << ipath << "> "
<< " is different from VISP_IMAGE_PATH=" << env_ipath << std::endl
<< " we skip the environment variable." << std::endl;
}
}
if (opt_ipath.empty() && env_ipath.empty()) {
usage(argv[0], NULL, ipath, opt_basename, opt_ext, opt_first, opt_nimages, opt_step, opt_nzero);
std::cerr << std::endl << "ERROR:" << std::endl;
std::cerr << " Use -i <visp image path> option or set VISP_INPUT_IMAGE_PATH " << std::endl
<< " environment variable to specify the location of the " << std::endl
<< " image path where test images are located." << std::endl
<< std::endl;
exit(-1);
}
std::cout <<
"Image size: width : " << I.
getWidth() <<
" height: " << I.
getHeight() << std::endl;
#if defined(VISP_HAVE_X11)
#elif defined(VISP_HAVE_GDI)
#else
std::cout << "No image viewer is available..." << std::endl;
#endif
if (opt_display) {
display.init(I, 100, 100, "Disk Framegrabber");
}
unsigned cpt = 1;
while (cpt++ < opt_nimages) {
if (opt_display) {
}
}
return EXIT_SUCCESS;
std::cout << "Catch an exception: " << e << std::endl;
return EXIT_FAILURE;
}
}
#else
int main()
{
std::cout << "You do not have X11, or GDI (Graphical Device Interface) functionalities to display images..." << std::endl;
std::cout << "Tip if you are on a unix-like system:" << std::endl;
std::cout << "- Install X11, configure again ViSP using cmake and build again this example" << std::endl;
std::cout << "Tip if you are on a windows-like system:" << std::endl;
std::cout << "- Install GDI, configure again ViSP using cmake and build again this example" << std::endl;
return EXIT_SUCCESS;
}
#endif