SIFT GPU wrapper functions
[Image processing]

Wrapper classes and functions for the GPU implementation of SIFT. More...

Functions
const QList< QVSiftFeature >	getSiftGPUFeatures (const QVImage< uChar > &image, nvidia_method method=CUDA_METHOD, bool computeDescriptors=FALSE, double filterWidthFactor=4.0, double orientationSampleWindow=2.0, double descriptorGridSize=3.0, int firstOctave=0, double thresholdDoG=0.02/3, double thresholdEdge=10.0, int d=3, int v=0)
	Find SIFT features in an image using user-specified parameter values, using NVIDIA CUDA.
QList< QPair< int, int > >	matchSiftGPUFeatures (const QList< QVSiftFeature > img1features, const QList< QVSiftFeature > img2features, const float distmax=0.7, const float ratiomax=0.8, const bool mutual_best_match=true)
	Match SIFT features between a pair of images using using NVIDIA CUDA.

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Detailed Description

Wrapper classes and functions for the GPU implementation of SIFT.

This group contains wrapper functions for the SIFT GPU implementation of Changchang Wu. You can enable the QVision compatibility with this software in the config.pri file.

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Function Documentation

const QList<QVSiftFeature> getSiftGPUFeatures	(	const QVImage< uChar > &	image,
		nvidia_method	method = CUDA_METHOD,
		bool	computeDescriptors = FALSE,
		double	filterWidthFactor = 4.0,
		double	orientationSampleWindow = 2.0,
		double	descriptorGridSize = 3.0,
		int	firstOctave = 0,
		double	thresholdDoG = 0.02/3,
		double	thresholdEdge = 10.0,
		int	d = 3,
		int	v = 0
	)

Find SIFT features in an image using user-specified parameter values, using NVIDIA CUDA.

Parameters:

	image	The image in which to detect features.
	method	0=CUDA, 1=GLSL, 2=CG
	computeDescriptors	Skip descriptor computation if TRUE (not modifiable after initialization)
	filterWidthFactor	Factor for filter width (2*factor*sigma+1).
	orientationSampleWindow	Factor for orientation sample window (2*factor*sigma).
	descriptorGridSize	Factor for descriptor grid size (4*factor*sigma).
	firstOctave	First octave to start detection.
	thresholdDoG	DoG threshold.
	thresholdEdge	Edge threshold.

Returns:

Returns the list of obtained keypoints (with descriptors if sd is not TRUE).

Definition at line 44 of file qvsiftgpu.cpp.

QList< QPair<int, int> > matchSiftGPUFeatures	(	const QList< QVSiftFeature >	img1features,
		const QList< QVSiftFeature >	img2features,
		const float	distmax = 0.7,
		const float	ratiomax = 0.8,
		const bool	mutual_best_match = true
	)

Match SIFT features between a pair of images using using NVIDIA CUDA.

Parameters:

	img1features	List of SIFT features from image 1.
	img2features	List of SIFT features from image 2.
	distmax	Maximum distance of SIFT descriptor.
	ratiomax	Maximum distance ratio.
	mutualBestMatch	Mutual best match or one way.

Returns:

Returns set of matchings. Each matching contains two index references, one for the feature in each input feature list.

Definition at line 154 of file qvsiftgpu.cpp.