#include <ImageProcessor.h>

Public Types
enum	MorphShape { morph_square = 0, morph_disk }

enum	MorphBorder { border_zero = 0, border_flip }

Static Public Member Functions
static cv::Mat	createStructuringElement (int seSize, int shape)
	Creates the structuring element for morphological operations. More...

static cv::Mat	dilateImage (const cv::Mat &bwImg, int seSize, MorphShape shape=IP::morph_square, int borderValue=0)
	Dilates the image bwImg with a given structuring element. More...

static cv::Mat	erodeImage (const cv::Mat &bwImg, int seSize, MorphShape shape=IP::morph_square, int borderValue=255)
	Erodes the image bwimg with a given structuring element. More...

static cv::Mat	convolveIntegralImage (const cv::Mat &src, const int kernelSizeX, const int kernelSizeY=0, MorphBorder norm=IP::border_zero)
	Convolves an integral image by means of box filters. This functions applies box filtering. It is specifically useful for the computation of image sums, mean filtering and standard deviation with big kernel sizes. More...

static cv::Mat	get1DGauss (double sigma, int kernelsize=-1)
	Computes a 1D Gaussian filter kernel. The kernel's size is adjusted to the standard deviation. More...

static cv::Mat	threshOtsu (const cv::Mat &srcImg, int thType=CV_THRESH_BINARY_INV)
	Threshold an image using Otsu as threshold. More...

static double	getThreshOtsu (const cv::Mat &hist, const double otsuThresh=0)
	Gets the Otsu threshold based on a certain histogram. More...

static void	setBorderConst (cv::Mat &src, float val=0.0f)
	Sets the border to a constant value (1 pixel width). More...

static void	invertImg (cv::Mat &srcImg, cv::Mat mask=cv::Mat())
	Inverts the img. More...

static cv::Mat	preFilterArea (const cv::Mat &img, int minArea, int maxArea=-1)
	Prefilters an binary image according to the blob size. Should be done to remove small blobs and to reduce the runtime of cvFindContours. More...

static cv::Mat	computeHist (const cv::Mat img, const cv::Mat mask=cv::Mat())
	Computes the histogram of an image. More...

static cv::Mat	estimateMask (const cv::Mat &src, bool preFilter=true)
	Estimates the mask. More...

static void	mulMask (cv::Mat &src, cv::Mat mask=cv::Mat())
	Applies a mask to the image. More...

static QPointF	calcRotationSize (double angleRad, const QPointF &srcSize)
	Calculates the image size of the rotated image. More...

static cv::Mat	rotateImage (const cv::Mat &src, double angleRad, int interpolation=cv::INTER_CUBIC, cv::Scalar borderValue=cv::Scalar(0))
	Rotates an image according to the angle obtained. The new image bounds are minimized with respect to the angle obtained. positive angle values mean counterclockwise rotation More...

static cv::Mat	invert (const cv::Mat &src)

static cv::Mat	grayscale (const cv::Mat &src)
	Returns the Luminance channel of Luv which is better than the RGB2Gray. More...

static cv::Mat	computeHist (const cv::Mat &data, int width, int numElements=-1, double *maxBin=0)
	Computes the histogram of data. Data can be any type (it will be reduced to CV_32F). More...

static void	draw (const std::vector< cv::Point > &pts, cv::Mat &img, unsigned char val=255)

static double	statMomentMat (const cv::Mat &src, const cv::Mat &mask=cv::Mat(), double momentValue=0.5, int maxSamples=10000, int area=-1)
	Computes robust statistical moments of an image. The quantiles of an image (or median) are computed. More...

static QColor	statMomentColor (const cv::Mat &src, const cv::Mat &mask=cv::Mat(), double momentValue=0.5)

static void	normalize (cv::Mat &src)

Member Enumeration Documentation

enum rdf::IP::MorphBorder

Enumerator
border_zero
border_flip

enum rdf::IP::MorphShape

Enumerator
morph_square
morph_disk

Member Function Documentation

QPointF rdf::IP::calcRotationSize	(	double	angleRad,
		const QPointF &	srcSize
	)

static

Calculates the image size of the rotated image.

Parameters

angleRad	The angle in radians.
srcSize	Size of the source image.

Returns: The Size of the rotated image.

cv::Mat rdf::IP::computeHist	(	const cv::Mat	img,
		const cv::Mat	mask = `cv::Mat()`
	)

static

Computes the histogram of an image.

Parameters

img	The source img CV_32FC1.
mask	The mask CV_8UC1 or CV_32FC1.

Returns: The histogram of the img as cv::mat CV_32FC1.

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cv::Mat rdf::IP::computeHist	(	const cv::Mat &	data,
		int	width,
		int	numElements = `-1`,
		double *	maxBin = `0`
	)

static

Computes the histogram of data. Data can be any type (it will be reduced to CV_32F).

Parameters

data	The data.
width	The length of the resulting histogram.
numElements	The number elements if data has more elements, it will be downsampled accordingly.
maxBin	The maximal bin of the resulting histogram.

Returns: A 1xN CV_32F. Each element represents a bin computed from data.

cv::Mat rdf::IP::convolveIntegralImage	(	const cv::Mat &	src,
		const int	kernelSizeX,
		const int	kernelSizeY = `0`,
		MorphBorder	norm = `IP::border_zero`
	)

static

Convolves an integral image by means of box filters. This functions applies box filtering. It is specifically useful for the computation of image sums, mean filtering and standard deviation with big kernel sizes.

Parameters

src	The integral image CV_64FC1.
kernelSizeX	The box filter's size.
kernelSizeY	The box filter's size.
norm	If BORDER_ZERO an image sum is computed, if BORDER_FLIP a mean filtering is applied.

Returns: The convolved image CV_32FC1.

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cv::Mat rdf::IP::createStructuringElement	(	int	seSize,
		int	shape
	)

static

Creates the structuring element for morphological operations.

Parameters

seSize	Size of the structuring element.
shape	The shape (either Square or Disk).

Returns: A cvMat containing the structuring element (CV_8UC1).

cv::Mat rdf::IP::dilateImage	(	const cv::Mat &	bwImg,
		int	seSize,
		MorphShape	shape = `IP::morph_square`,
		int	borderValue = `0`
	)

static

Dilates the image bwImg with a given structuring element.

Parameters

bwImg	The bwImg: a grayscale image CV_8U (or CV_32F [0 1] but slower).
seSize	The structuring element's size.
shape	The shape (either Square or Disk).
borderValue	The border value.

Returns: An dilated image (CV_8U or CV_32F).

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void rdf::IP::draw	(	const std::vector< cv::Point > &	pts,
		cv::Mat &	img,
		unsigned char	val = `255`
	)

static

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cv::Mat rdf::IP::erodeImage	(	const cv::Mat &	bwImg,
		int	seSize,
		MorphShape	shape = `IP::morph_square`,
		int	borderValue = `255`
	)

static

Erodes the image bwimg with a given structuring element.

Parameters

bwImg	The bwimg: a grayscale image CV_8U (or CV_32F [0 1] but slower).
seSize	The structuring element's size.
shape	The shape (either Square or Disk).
borderValue	The border value.

Returns: An eroded image (CV_8U or CV_32F).

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cv::Mat rdf::IP::estimateMask	(	const cv::Mat &	src,
		bool	preFilter = `true`
	)

static

Estimates the mask.

Parameters

src	The source image.

Returns: The estimated mask.

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cv::Mat rdf::IP::get1DGauss	(	double	sigma,
		int	kernelsize = `-1`
	)

static

Computes a 1D Gaussian filter kernel. The kernel's size is adjusted to the standard deviation.

Parameters

sigma The standard deviation of the Gaussian.

Returns: The Gaussian kernel CV_32FC1

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double rdf::IP::getThreshOtsu	(	const cv::Mat &	hist,
		const double	otsuThresh = `0`
	)

static

Gets the Otsu threshold based on a certain histogram.

Parameters

hist	The histogram CV_32FC1.
otsuThresh	The otsu threshold - deprecated.

Returns: The computed threshold.

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cv::Mat rdf::IP::grayscale ( const cv::Mat & src )

static

Returns the Luminance channel of Luv which is better than the RGB2Gray.

Parameters

src	The source.

Returns

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cv::Mat rdf::IP::invert ( const cv::Mat & src )

static

void rdf::IP::invertImg	(	cv::Mat &	srcImg,
		cv::Mat	mask = `cv::Mat()`
	)

static

Inverts the img.

Parameters

srcImg	The source img CV_32FC1 [0 1] or CV_8UC1.
mask	The mask.

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void rdf::IP::mulMask	(	cv::Mat &	src,
		cv::Mat	mask = `cv::Mat()`
	)

static

Applies a mask to the image.

Parameters

src	The source img CV_8U or CV_32F.
mask	The optional mask CV_8U or CV_32F.

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void rdf::IP::normalize ( cv::Mat & src )

static

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cv::Mat rdf::IP::preFilterArea	(	const cv::Mat &	img,
		int	minArea,
		int	maxArea = `-1`
	)

static

Prefilters an binary image according to the blob size. Should be done to remove small blobs and to reduce the runtime of cvFindContours.

Parameters

img	The source img CV_8UC1.
minArea	The blob size threshold in pixel.
maxArea	The maximum area.

Returns: A CV_8UC1 binary image with all blobs smaller than minArea removed.

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cv::Mat rdf::IP::rotateImage	(	const cv::Mat &	src,
		double	angleRad,
		int	interpolation = `cv::INTER_CUBIC`,
		cv::Scalar	borderValue = `cv::Scalar(0)`
	)

static

Rotates an image according to the angle obtained. The new image bounds are minimized with respect to the angle obtained. positive angle values mean counterclockwise rotation

Parameters

src	The source image.
angleRad	The angle in RAD.
interpolation	The interpolation.
borderValue	The border value.

Returns: The rotated image.

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void rdf::IP::setBorderConst	(	cv::Mat &	src,
		float	val = `0.0f`
	)

static

Sets the border to a constant value (1 pixel width).

Parameters

src	The source image CV_32F or CV_8U.
val	The border value.

QColor rdf::IP::statMomentColor	(	const cv::Mat &	src,
		const cv::Mat &	mask = `cv::Mat()`,
		double	momentValue = `0.5`
	)

static

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double rdf::IP::statMomentMat	(	const cv::Mat &	src,
		const cv::Mat &	mask = `cv::Mat()`,
		double	momentValue = `0.5`,
		int	maxSamples = `10000`,
		int	area = `-1`
	)

static

Computes robust statistical moments of an image. The quantiles of an image (or median) are computed.

Parameters

src	The source image CV_32FC1.
mask	The mask CV_32FC1 or CV_8UC1.
momentValue	The moment (e.g. 0.5 for median, 0.25 or 0.75 for quartiles).
maxSamples	The maximum number of samples (speed up).
area	The mask's area (speed up).

Returns: The statistical moment.

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cv::Mat rdf::IP::threshOtsu	(	const cv::Mat &	srcImg,
		int	thType = `CV_THRESH_BINARY_INV`
	)

static

Threshold an image using Otsu as threshold.

Parameters

srcImg The source img CV_8UC1 or CV_8UC3.

Returns: A binary image CV_8UC1

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

src/Core/ImageProcessor.h
src/Core/ImageProcessor.cpp

Public Types

Static Public Member Functions

Member Enumeration Documentation

Member Function Documentation