Module sift

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Detailed Description

Version:

0.2

Author:

thomas.lemaire@laas.fr cyrille.berger@laas.fr

This module offers two wrappers around sift implementation.

This module is a wrapper around David Lowe binary demo program. This demo program is available only for linux intel based systems.

• David Lowe's web page about SIFT: http://www.cs.ubc.ca/~lowe/keypoints/
• David Lowe's journal paper about SIFT here: doc/loweIJCV2004.pdf

The second wrapper is around a GPL SIFT Library: http://web.engr.oregonstate.edu/~hess/index.html

History

• 0.1 (2005-12-14) - Initial version, using siftDemoV4
• 0.2 (2007-12-19) - Bind a SIFT detector with gfm

Requirements

If you want to use the SIFT implementation from Lowe:

• the SIFT demo binary is only available for linux/intel,
• you must have convert command from ImageMagick package in your path (http://www.imagemagick.org)
• your image format must be supported by ImageMagick (this is very likely to be the case !)

If you want to use the gfm wrapper, you have no external requirements.

Tcl interface (generated by swig)

The interface of the module is generated from the following files:

• sift.i defines the wrapped classes and functions,
• siftException.i defines the try { } catch block for this module.

Classes
struct	jafar::sift::DBKey
	Key entry for the database. More...
struct	jafar::sift::SiftPoint
	A simple SIFT point. More...
class	jafar::sift::DataBase
	Very basic database of SIFT points. More...
class	jafar::sift::SiftDetector
	This class bind a SIFT detector to gfm. More...
class	jafar::sift::SiftException
	Base class for all exceptions defined in the module sift. More...
Functions
template<class Container >
void	jafar::sift::demoWrapper (std::string const &imageFileName, double scale, Container &siftPointsContainer)
	This wrapper function calls the demo binary executable.

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Function Documentation

template<class Container >

void jafar::sift::demoWrapper	(	std::string const &	imageFileName,
		double	scale,
		Container &	siftPointsContainer
	)

This wrapper function calls the demo binary executable.

Parameters:

imageFileName	path to the image, can be any format supported by image magick
scale	the image can be resized before sift extraction
siftPointsContainer	sift features will be put here, it must contains jafar::sift::SiftPoint

Definition at line 32 of file demoWrapper.hpp.

References jafar::kernel::Chrono::elapsed(), JFR_ASSERT, JFR_DEBUG, and JFR_IO_STREAM.