x2pgm.cc

torch tracking code, it is a good code

const char *help = "\
progname: x2pgm.cc\n\
code2html: This program reads an image and saves it as a pgm.\n\
version: Torch3 vision2.0, 2004-2005\n\
(c) Sebastien Marcel ([e-mail])\n";

#include "ImageGray.h"
#include "xtprobeImageDiskXFile.h"

#include "CmdLine.h"

using namespace Torch;

int main(int argc, char **argv)
{
	char *image_filename;
	bool verbose;

	// Construct the command line
  	CmdLine cmd;
	cmd.setBOption("write log", false);
	
  	// Put the help line at the beginning
  	cmd.info(help);

  	cmd.addText("\nArguments:");
  	cmd.addSCmdArg("image filename", &image_filename, "image filename");
  	cmd.addText("\nOptions:");
  	cmd.addBCmdOption("-verbose", &verbose, false, "verbose");

	cmd.read(argc, argv);

  	ImageDiskXFile *image_file = NULL;
	Image *grayimage = NULL;

	grayimage = new ImageGray();
	grayimage->setBOption("verbose", verbose);

	image_file = new xtprobeImageDiskXFile(image_filename, "r");
	grayimage->loadImageXFile(image_file);
	delete image_file;

	if(verbose)
	{
		print("Image info:\n");
		print("   width = %d\n", grayimage->width);
		print("   height = %d\n", grayimage->height);
		print("   format = %s (%d)\n", grayimage->coding, grayimage->n_planes);
	}
	
	grayimage->save("gray.pgm");
	
	delete grayimage;

	return(0);
}