de.lmu.ifi.dbs.jfeaturelib.utils

Interface GradientSource

All Known Implementing Classes:

GradientImage

public interface GradientSource

Defines a class from which image gradients can be obtained. Implementations could be simply sobel-filtered images or canny edge processed images

Author:

graf

Method Summary

Methods

Modifier and Type	Method and Description
double	getLength(int x, int y) Returns the length of the gradient at pixel location x,y.
double	getTheta(int x, int y)
void	setIp(ij.process.ImageProcessor ip) Initialize the GradientSource with this Processor

Method Detail

setIp

void setIp(ij.process.ImageProcessor ip)

Initialize the GradientSource with this Processor

Parameters:

ip -

getLength

double getLength(int x,
               int y)

Returns the length of the gradient at pixel location x,y.

Parameters:

x -

y -

Returns:

Math.sqrt(dx * dx + dy * dy)

getTheta

double getTheta(int x,
              int y)

Parameters:

x -

y -

Returns:

Math.atan(dy / dx) or 0