BRISC::Core::GaborFilter Class Reference

Performs Gabor filtering operations on a LIDCNodule. More...

List of all members.

Static Public Member Functions
static void	PerformGaborFilter (LIDCNodule nodule)
	Performs a Gabor filter on the given nodule and saves the histogram of the response images (for each orientation and frequency) to the appropriate LIDCNodule fields.
static double[][,]	ApplyFilter (int[,] I)
	Applies a bank of Gabor filters to the given image.
Static Public Attributes
static int	histBins = 8
	Number of bins in the response histograms.
static double	histMaxVal = 600
	Maximum value for the response histogram. Everything above this will be binned into the top bin.
static double	histMinVal = 0
	Minimum value for the response histogram. Everything below this value will be binned into the bottom bin.
Static Private Member Functions
static double[,]	buildFilter (int Sx, int Sy, double sigma, double gamma, double lamda, double theta)
	Builds a Gabor filter.
static double[,]	convolve (int[,] I, double[,] filter)
	Convolves an image with the given filter.

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Detailed Description

Performs Gabor filtering operations on a LIDCNodule.

Gabor filtering is an operation in which an NxN matrix (the Gabor filter) is applied (convolved) to a given image. The filter is defined in BuildFilter. The filter has two parameters which vary -- orientation (angle) and scale (frequency).

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Member Function Documentation

static double [][,] BRISC::Core::GaborFilter::ApplyFilter

(

int

I[,]

)

[inline, static]

Applies a bank of Gabor filters to the given image.

Parameters:

I

Input image

Returns:

Twelve Gabor response images

static double [,] BRISC::Core::GaborFilter::buildFilter	(	int	Sx,
		int	Sy,
		double	sigma,
		double	gamma,
		double	lamda,
		double	theta
	)			[inline, static, private]

Builds a Gabor filter.

Parameters:

	Sx	width
	Sy	height
	sigma	Width of Gaussian
	gamma	Spatial aspect ratio. Should be .5
	lamda	Wavelength
	theta	Orientaiton of filter

Returns:

Gabor filter in a 2D double matrix

static double [,] BRISC::Core::GaborFilter::convolve	(	int	I[,],
		double	filter[,]
	)			[inline, static, private]

Convolves an image with the given filter.

Parameters:

	I	Source image to convole
	filter	Filter to apply to source

Returns:

Convolved image

static void BRISC::Core::GaborFilter::PerformGaborFilter

(

LIDCNodule

nodule

)

[inline, static]

Performs a Gabor filter on the given nodule and saves the histogram of the response images (for each orientation and frequency) to the appropriate LIDCNodule fields.

Parameters:

nodule

LIDCNodule to run the Gabor filter on

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Member Data Documentation

double BRISC::Core::GaborFilter::histMaxVal = 600 [static]

Maximum value for the response histogram. Everything above this will be binned into the top bin.

Currently set to about three standard deviations above the mean for our dataset.

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The documentation for this class was generated from the following file:

• C:/Documents and Settings/mlam/My Documents/svn-sf-main/src/Core/GaborFilter.cs

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