Gradient (DMLab Library API for 0.0.4-SNAPSHOT)

java.lang.Object
- edu.gsu.cs.dmlab.datatypes.Gradient

```
public class Gradient
extends Object
```
A classes for holding the gradient values of an image in the x and y direction.

Author:

Dustin Kempton, Data Mining Lab, Georgia State University

Field Summary

Fields
Modifier and Type	Field	Description
`double[][]`	`gd`	This is the same for both Cartesian and Polar system.
`double[]`	`gd_f`
`double[][]`	`gx`	In case of Gradient in the Cartesian system, this is the matrix of gradient values when comparing pixels in the X direction.
`double[]`	`gx_f`
`double[][]`	`gy`	In case of Gradient in the Cartesian system, this is the matrix of gradient values when comparing pixels in the Y direction.
`double[]`	`gy_f`

Constructor Summary

Constructors
Constructor Description

Gradient()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

void finalize()
- Methods inherited from class java.lang.Object
  clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - gx
```
public double[][] gx
```
    In case of Gradient in the Cartesian system, this is the matrix of gradient values when comparing pixels in the X direction. In case of Gradient in the Polar system, this is the matrix of angles.
  - gx_f
```
public double[] gx_f
```
  - gy
```
public double[][] gy
```
    In case of Gradient in the Cartesian system, this is the matrix of gradient values when comparing pixels in the Y direction. In case of Gradient in the Polar system, this is the matrix of Radii.
  - gy_f
```
public double[] gy_f
```
  - gd
```
public double[][] gd
```
    This is the same for both Cartesian and Polar system. This is an auxiliary matrix to help distinguish the zero values in the Polar system. Gradient in the Polar system gets zero in the following cases and without 'gd' there is no way to distinguish them: 1. gx[i][j] = 0, gy[i][j] = 0 --> because (i,j) lies on a solid area. 2. gx[i][j] = 0, gy[i][j] = 0 --> because (i,j) lies on a vertical line of width 1 px. 3. gx[i][j] = 0, gy[i][j] = 0 --> because (i,j) lies on a horizontal line of width 2 px.
  - gd_f
```
public double[] gd_f
```
- Constructor Detail
  - Gradient
```
public Gradient()
```
- Method Detail
  - finalize
```
public void finalize()
              throws Throwable
```
    Overrides:
    
    finalize in class Object
    
    Throws:
    
    Throwable