OneMinusErf (SNT Javadocs 0-SNAPSHOT API)

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java.lang.Object
- sc.fiji.snt.tracing.cost.OneMinusErf

All Implemented Interfaces:

Cost
```
public class OneMinusErf
extends Object
implements Cost
```
A cost function inspired by an A* search implementation in the Janelia Workstation, where the cost of moving to a new voxel is given by the complementary error function 1 - erf(z), where
erf(x) is the Error Function

z is the Standard Score of the voxel intensity at the new point, given the intensity statistics of the underlying image

Author:

Cameron Arshadi

Constructor Summary

Constructors
Constructor and Description

OneMinusErf(double max, double average, double standardDeviation)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`double`	`costMovingTo(double valueAtNewPoint)`
`double`	`getZFudge()`
`double`	`minStepCost()`
`void`	`setZFudge(double zFudge)` Scale factor for intensity z-score.
`protected double`	`zScore(double valueAtNewPoint)`

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

- Constructor Detail
  - OneMinusErf
```
public OneMinusErf(double max,
                   double average,
                   double standardDeviation)
```
    Parameters:
    
    max - the maximum intensity value of the image, used to compute the minimum step cost
    
    average - the average intensity value of the image, used to compute the intensity z-score
    
    standardDeviation - the standard deviation of the intensity values of the image, used to compute the intensity z-score
- Method Detail
  - costMovingTo
```
public double costMovingTo(double valueAtNewPoint)
```
    Specified by:
    
    costMovingTo in interface Cost
  - setZFudge
```
public void setZFudge(double zFudge)
```
    Scale factor for intensity z-score. Values less than 1 help numerically distinguish very bright voxels, and will cause more nodes to be explored. Default is 1.0.
    
    Parameters:
    
    zFudge - the z-score is post-multiplied by this value
  - getZFudge
```
public double getZFudge()
```
  - zScore
```
protected double zScore(double valueAtNewPoint)
```
  - minStepCost
```
public double minStepCost()
```
    Specified by:
    
    minStepCost in interface Cost

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