Package ai.djl.modality.cv.translator

Class ImageServingTranslator

java.lang.Object

ai.djl.modality.cv.translator.ImageServingTranslator

All Implemented Interfaces:

PostProcessor<Output>, PreProcessor<Input>, Translator<Input,Output>

public class ImageServingTranslator
extends java.lang.Object
implements Translator<Input,Output>

A Translator that can handle generic CV Input and Output.

Constructor Summary

Constructors

Constructor	Description
ImageServingTranslator(Translator<Image,?> translator)	Constructs a new ImageServingTranslator instance.

Method Summary

Modifier and Type	Method	Description
Batchifier	getBatchifier()	Returns the Batchifier.
void	prepare(TranslatorContext ctx)	Prepares the translator with the manager and model to use.
NDList	processInput(TranslatorContext ctx, Input input)	Processes the input and converts it to NDList.
Output	processOutput(TranslatorContext ctx, NDList list)	Processes the output NDList to the corresponding output object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.djl.translate.Translator

getExpansions, toBatchTranslator, toBatchTranslator

Constructor Detail

ImageServingTranslator

public ImageServingTranslator(Translator<Image,?> translator)

Constructs a new ImageServingTranslator instance.

Parameters:

translator - a Translator processes Image input

Method Detail

getBatchifier

public Batchifier getBatchifier()

Returns the Batchifier.

Specified by:

getBatchifier in interface Translator<Input,Output>

Returns:

the Batchifier

processOutput

public Output processOutput(TranslatorContext ctx,
                            NDList list)
                     throws java.lang.Exception

Processes the output NDList to the corresponding output object.

Specified by:

processOutput in interface PostProcessor<Output>

Parameters:

ctx - the toolkit used for post-processing

list - the output NDList after inference, usually immutable in engines like PyTorch. @see Issue 1774

Returns:

the output object of expected type

Throws:

java.lang.Exception - if an error occurs during processing output

processInput

public NDList processInput(TranslatorContext ctx,
                           Input input)
                    throws java.lang.Exception

Processes the input and converts it to NDList.

Specified by:

processInput in interface PreProcessor<Input>

Parameters:

ctx - the toolkit for creating the input NDArray

input - the input object

Returns:

the NDList after pre-processing

Throws:

java.lang.Exception - if an error occurs during processing input

prepare

public void prepare(TranslatorContext ctx)
             throws java.lang.Exception

Prepares the translator with the manager and model to use.

Specified by:

prepare in interface Translator<Input,Output>

Parameters:

ctx - the context for the Predictor.

Throws:

java.lang.Exception - if there is an error for preparing the translator