canny.cc

torch tracking code, it is a good code

const char *help = "\
progname: canny.cc\n\
code2html: This program reads a ppm image and performs Canny edge detection.\n\
version: Torch3 vision2.0, 2004-2005\n\
(c) Sebastien Marcel ([e-mail])\n";

#include "ImageGray.h"
#include "xtprobeImageDiskXFile.h"
#include "ipCanny.h"
#include "CmdLine.h"

using namespace Torch;

int main(int argc, char **argv)
{
	char *image_filename;
	real threshold;
	bool verbose;
  
  	
	CmdLine cmd;
	cmd.setBOption("write log", false);
  	cmd.info(help);
  	cmd.addText("\nArguments:");
  	cmd.addSCmdArg("image filename", &image_filename, "image filename");
  	cmd.addText("\nOptions:");
  	cmd.addRCmdOption("-threshold", &threshold, 10, "threshold");
  	cmd.addBCmdOption("-verbose", &verbose, false, "verbose");
	cmd.read(argc, argv);

	
	Image *image_in = NULL;
	Image *image_out = NULL;
	ImageDiskXFile *image_file = NULL;

	image_in = new ImageGray();
	image_file = new xtprobeImageDiskXFile(image_filename, "r");

	if(!image_in->loadImageXFile(image_file))
		error("Impossible to load the image");

	delete image_file;

	if(verbose)
	{
		print("Image info:\n");
		print("   width = %d\n", image_in->width);
		print("   height = %d\n", image_in->height);
		print("   format = %s (%d)\n", image_in->coding, image_in->n_planes);
	}

	ipCore *canny = NULL;

	canny = new ipCanny(image_in->width, image_in->height, "gray", threshold);
	canny->setBOption("verbose", verbose);
	canny->process(image_in);
	
	image_out = new ImageGray();
	image_out->setBOption("verbose", verbose);

	image_out->copyFrom(image_in->width, image_in->height, canny->seq_out->frames[0], "gray");
	image_out->save("gradientxy.pgm");

	image_out->copyFrom(image_in->width, image_in->height, canny->seq_out->frames[1], "gray");
	image_out->save("gradient.pgm");

	image_out->copyFrom(image_in->width, image_in->height, canny->seq_out->frames[2], "gray");
	image_out->save("canny.pgm");

	delete canny;
	delete image_out;
	delete image_in;

	return(0);
}