SingleShotDetectionAccuracy (Deep Java Library 0.24.0 API specification)

java.lang.Object
- ai.djl.training.evaluator.Evaluator
- - ai.djl.training.evaluator.AbstractAccuracy
  - - ai.djl.training.evaluator.SingleShotDetectionAccuracy

```
public class SingleShotDetectionAccuracy
extends AbstractAccuracy
```
SingleShotDetectionAccuracy is an implementation of AbstractAccuracy. It is used while training a Single Shot Detection (SSD) model for object detection. It uses the targets computed by MultiBoxTarget, and computes the class prediction accuracy against the computed targets.

Field Summary
- Fields inherited from class ai.djl.training.evaluator.AbstractAccuracy
  axis, correctInstances
- Fields inherited from class ai.djl.training.evaluator.Evaluator
  totalInstances

Constructor Summary

Constructors
Constructor Description

SingleShotDetectionAccuracy(java.lang.String name)
Creates a new instance of SingleShotDetectionAccuracy with the given name.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected ai.djl.util.Pair<java.lang.Long,NDArray>`	`accuracyHelper(NDList labels, NDList predictions)`	A helper for classes extending `AbstractAccuracy`.

Methods inherited from class ai.djl.training.evaluator.AbstractAccuracy
addAccumulator, evaluate, getAccumulator, resetAccumulator, updateAccumulator

Methods inherited from class ai.djl.training.evaluator.Evaluator
checkLabelShapes, checkLabelShapes, getName

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

- Constructor Detail
  - SingleShotDetectionAccuracy
```
public SingleShotDetectionAccuracy(java.lang.String name)
```
    Creates a new instance of SingleShotDetectionAccuracy with the given name.
    
    Parameters:
    
    name - the name given to the accuracy
- Method Detail
  - accuracyHelper
```
protected ai.djl.util.Pair<java.lang.Long,NDArray> accuracyHelper(NDList labels,
                                                                        NDList predictions)
```
    A helper for classes extending AbstractAccuracy.
    
    Specified by:
    
    accuracyHelper in class AbstractAccuracy
    
    Parameters:
    
    labels - the labels to get accuracy for
    
    predictions - the predictions to get accuracy for
    
    Returns:
    
    a pair(number of total values, ndarray int of correct values)