jigl.image.utils
Class LocalDifferentialGeometry

java.lang.Object
  |
  +--jigl.image.utils.LocalDifferentialGeometry

class LocalDifferentialGeometry

extends Object

This class performs various differential geometry operations on a specified area of an image. While DifferentialGeometry does the calculations for the whole image.

It calculates only as needed and then stores the results into various internal images. For example, if an operation needs the first derivative calculated, then it will store the result internally for use later on.

Suports only RealGrayImage

Field Summary

double	avgAbsKappa The average absolute Kappa value for current image.
double	avgKappaSquare The average squared Kappa value for current image.
RealGrayImage	GradientMagnitude A image stores the gradient magnitude (steep) at each pixel.
RealGrayImage	image Original image
RealGrayImage	IsophoteCurvature A image stores the isophote curvature at each pixel.
RealGrayImage	IsophoteCurvatureFlow A image stores the isophote curvature at each pixel.
RealGrayImage	IxImage First derivative in the x direction.
RealGrayImage	IxxImage Second derivative in the x direction.
RealGrayImage	IxyImage second derivative in the xy direction
RealGrayImage	IyImage First derivative in the y direction.
RealGrayImage	IyyImage Second derivative in the y direction.
RealGrayImage	OrientationMap A image stores the gradient phase at each pixel.
double	stdDevAbsKappa The standard deviation of Kappa value.
double	stdDevKappaSquare The standard deviation of squared Kappa value.

Constructor Summary

LocalDifferentialGeometry()
Default constructor

LocalDifferentialGeometry(RealGrayImage im)
Constructs a LocalDifferentialGeometry object from a RealGrayImage.

Method Summary

RealGrayImage	calcApproximateGradientMagnitude(int x1, int y1, int x2, int y2) Calculates the approximate gradient magnitude for each pixel in a specified area and stores the result in a RealGrayImage pointer.
RealGrayImage	calcGradientMagnitude(int x1, int y1, int x2, int y2) Calculates the gradient magnitude for each pixel in a specified area and stores the result in a RealGrayImage pointer.
RealGrayImage	calcIsophote(int x1, int y1, int x2, int y2) This method caluculates the isophote curvature image in a specified area.
void	calcIsophoteCurvature(int x1, int y1, int x2, int y2, RealGrayImage src, RealGrayImage dest) Overloaded function to stores the result in a RealGrayImage object pointed by dest.
RealGrayImage	calcIsophoteFlow(int x1, int y1, int x2, int y2) This method caluculates the Isophote flow of a RealGrayImage image at the specified area.
void	calcIsophoteFlow(int x1, int y1, int x2, int y2, RealGrayImage src, RealGrayImage dest) Overloaded function to stores the result in a RealGrayImage object pointed by dest.
RealGrayImage	calcIsophoteFlowStore(int x1, int y1, int x2, int y2) isophote flow???
RealGrayImage	calcIsophoteStore(int x1, int y1, int x2, int y2) Calculates the isophote curvature at each pixel in a specified area of current image and returns the result curvature image.
RealGrayImage	calcIx(int x1, int y1, int x2, int y2) Calculates Ix (first derivative in the x direction) of the image in a specified area.
void	calcIx(RealGrayImage src, RealGrayImage dest, int x1, int y1, int x2, int y2) Overloaded methods to calculate Ix and the result is stored in the image pointed to by dest.
RealGrayImage	calcIxx(int x1, int y1, int x2, int y2) Calculates Ixx (second derivative in the x direction) of the image in a specified area.
RealGrayImage	calcIxy(int x1, int y1, int x2, int y2) Calculates Ixy (second derivative in the xy direction) of the image in a specified area.
RealGrayImage	calcIy(int x1, int y1, int x2, int y2) Calculate Iy (first derivative in the y direction) of the image in a specified area.
void	calcIy(RealGrayImage src, RealGrayImage dest, int x1, int y1, int x2, int y2) Overloaded methods to calculate Ix and the result is stored in the image pointed to by dest.
RealGrayImage	calcIyy(int x1, int y1, int x2, int y2) Calculates Iyy (second derivative in the y direction) of the image in a specified area.
RealGrayImage	calcOrientationMap(int x1, int y1, int x2, int y2) Calculates the gradient phase for each pixel in a specified area and stores the result in a RealGrayImage pointer.
void	setImage(RealGrayImage im, int x1, int y1, int x2, int y2) Substitutes current image by another image in a specified rectangle area.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

avgKappaSquare

public double avgKappaSquare

The average squared Kappa value for current image.

avgAbsKappa

public double avgAbsKappa

The average absolute Kappa value for current image.

stdDevAbsKappa

public double stdDevAbsKappa

The standard deviation of Kappa value.

stdDevKappaSquare

public double stdDevKappaSquare

The standard deviation of squared Kappa value.

image

public RealGrayImage image

Original image

IxImage

public RealGrayImage IxImage

First derivative in the x direction.

IyImage

public RealGrayImage IyImage

First derivative in the y direction.

IxxImage

public RealGrayImage IxxImage

Second derivative in the x direction.

IyyImage

public RealGrayImage IyyImage

Second derivative in the y direction.

IxyImage

public RealGrayImage IxyImage

second derivative in the xy direction

GradientMagnitude

public RealGrayImage GradientMagnitude

A image stores the gradient magnitude (steep) at each pixel.

IsophoteCurvature

public RealGrayImage IsophoteCurvature

A image stores the isophote curvature at each pixel.

IsophoteCurvatureFlow

public RealGrayImage IsophoteCurvatureFlow

A image stores the isophote curvature at each pixel.

OrientationMap

public RealGrayImage OrientationMap

A image stores the gradient phase at each pixel.

Constructor Detail

LocalDifferentialGeometry

public LocalDifferentialGeometry(RealGrayImage im)

Constructs a LocalDifferentialGeometry object from a RealGrayImage.

LocalDifferentialGeometry

public LocalDifferentialGeometry()

Default constructor

Method Detail

calcIx

public RealGrayImage calcIx(int x1,
                            int y1,
                            int x2,
                            int y2)

Calculates Ix (first derivative in the x direction) of the image in a specified area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIy

public RealGrayImage calcIy(int x1,
                            int y1,
                            int x2,
                            int y2)

Calculate Iy (first derivative in the y direction) of the image in a specified area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIxx

public RealGrayImage calcIxx(int x1,
                             int y1,
                             int x2,
                             int y2)

Calculates Ixx (second derivative in the x direction) of the image in a specified area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIyy

public RealGrayImage calcIyy(int x1,
                             int y1,
                             int x2,
                             int y2)

Calculates Iyy (second derivative in the y direction) of the image in a specified area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIxy

public RealGrayImage calcIxy(int x1,
                             int y1,
                             int x2,
                             int y2)

Calculates Ixy (second derivative in the xy direction) of the image in a specified area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIsophoteStore

public RealGrayImage calcIsophoteStore(int x1,
                                       int y1,
                                       int x2,
                                       int y2)

Calculates the isophote curvature at each pixel in a specified area of current image and returns the result curvature image. The formula is:

         Isophote curvature = ((Iy*Iy*Ixx)-(2*Ix*Ixy*Iy) + (Iyy*Ix*Ix)) /
                                 sqrt(((Ix*Ix)+(Iy*Iy)) * ((Ix*Ix) + (Iy*Iy)) * ((Ix*Ix)+(Iy*Iy)));
         

parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIsophote

public RealGrayImage calcIsophote(int x1,
                                  int y1,
                                  int x2,
                                  int y2)

This method caluculates the isophote curvature image in a specified area. This function is less memory floatensive than calcIsophoteStore. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIsophoteFlowStore

public RealGrayImage calcIsophoteFlowStore(int x1,
                                           int y1,
                                           int x2,
                                           int y2)

isophote flow???

calcIsophoteFlow

public RealGrayImage calcIsophoteFlow(int x1,
                                      int y1,
                                      int x2,
                                      int y2)

This method caluculates the Isophote flow of a RealGrayImage image at the specified area. This function is less memory floatensive than calcIsophoteFlowStore

calcGradientMagnitude

public RealGrayImage calcGradientMagnitude(int x1,
                                           int y1,
                                           int x2,
                                           int y2)

Calculates the gradient magnitude for each pixel in a specified area and stores the result in a RealGrayImage pointer. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcApproximateGradientMagnitude

public RealGrayImage calcApproximateGradientMagnitude(int x1,
                                                      int y1,
                                                      int x2,
                                                      int y2)

Calculates the approximate gradient magnitude for each pixel in a specified area and stores the result in a RealGrayImage pointer. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcOrientationMap

public RealGrayImage calcOrientationMap(int x1,
                                        int y1,
                                        int x2,
                                        int y2)

Calculates the gradient phase for each pixel in a specified area and stores the result in a RealGrayImage pointer. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIsophoteCurvature

public void calcIsophoteCurvature(int x1,
                                  int y1,
                                  int x2,
                                  int y2,
                                  RealGrayImage src,
                                  RealGrayImage dest)

Overloaded function to stores the result in a RealGrayImage object pointed by dest.

calcIsophoteFlow

public void calcIsophoteFlow(int x1,
                             int y1,
                             int x2,
                             int y2,
                             RealGrayImage src,
                             RealGrayImage dest)

Overloaded function to stores the result in a RealGrayImage object pointed by dest.

setImage

public void setImage(RealGrayImage im,
                     int x1,
                     int y1,
                     int x2,
                     int y2)

Substitutes current image by another image in a specified rectangle area. parameters: x1 - the left bound of the specified area y1 - the right bottom bound of the specified area x2 - the right bound of the specified area y2 - the top bound of the specified area

calcIy

public void calcIy(RealGrayImage src,
                   RealGrayImage dest,
                   int x1,
                   int y1,
                   int x2,
                   int y2)

Overloaded methods to calculate Ix and the result is stored in the image pointed to by dest. The origin of *dest is (x1,y1) of image *src.

calcIx

public void calcIx(RealGrayImage src,
                   RealGrayImage dest,
                   int x1,
                   int y1,
                   int x2,
                   int y2)

Overloaded methods to calculate Ix and the result is stored in the image pointed to by dest. The origin of *dest is (x1,y1) of image *src.