Package ai.djl.modality.cv.translator

Class YoloV5Translator

java.lang.Object

ai.djl.modality.cv.translator.BaseImageTranslator<DetectedObjects>

ai.djl.modality.cv.translator.ObjectDetectionTranslator

ai.djl.modality.cv.translator.YoloV5Translator

All Implemented Interfaces:

PostProcessor<DetectedObjects>, PreProcessor<Image>, Translator<Image,DetectedObjects>

Direct Known Subclasses:

YoloV8Translator

public class YoloV5Translator
extends ObjectDetectionTranslator

A translator for YoloV5 models. This was tested with ONNX exported Yolo models. For details check here: https://github.com/ultralytics/yolov5

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	YoloV5Translator.Builder	The builder for YoloV5Translator.
protected static final class	YoloV5Translator.IntermediateResult
static enum	YoloV5Translator.YoloOutputType	A enum represents the Yolo output type.

Nested classes/interfaces inherited from class ai.djl.modality.cv.translator.ObjectDetectionTranslator

ObjectDetectionTranslator.ObjectDetectionBuilder<T extends ObjectDetectionTranslator.ObjectDetectionBuilder>

Nested classes/interfaces inherited from class ai.djl.modality.cv.translator.BaseImageTranslator

BaseImageTranslator.BaseBuilder<T extends BaseImageTranslator.BaseBuilder>, BaseImageTranslator.ClassificationBuilder<T extends BaseImageTranslator.BaseBuilder>, BaseImageTranslator.SynsetLoader

Field Summary

Fields inherited from class ai.djl.modality.cv.translator.ObjectDetectionTranslator

applyRatio, classes, imageHeight, imageWidth, threshold

Fields inherited from class ai.djl.modality.cv.translator.BaseImageTranslator

pipeline

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	YoloV5Translator(YoloV5Translator.Builder builder)	Constructs an ImageTranslator with the provided builder.

Method Summary

Modifier and Type	Method	Description
protected double	boxIntersection(Rectangle a, Rectangle b)
protected double	boxIou(Rectangle a, Rectangle b)
protected double	boxUnion(Rectangle a, Rectangle b)
static YoloV5Translator.Builder	builder()	Creates a builder to build a YoloV5Translator.
static YoloV5Translator.Builder	builder(Map<String,?> arguments)	Creates a builder to build a YoloV5Translator with specified arguments.
protected DetectedObjects	nms(List<YoloV5Translator.IntermediateResult> list)
protected double	overlap(double x1, double w1, double x2, double w2)
protected DetectedObjects	processFromBoxOutput(NDList list)
DetectedObjects	processOutput(TranslatorContext ctx, NDList list)	Processes the output NDList to the corresponding output object.

Methods inherited from class ai.djl.modality.cv.translator.ObjectDetectionTranslator

prepare

Methods inherited from class ai.djl.modality.cv.translator.BaseImageTranslator

getBatchifier, processInput

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

batchProcessInput, batchProcessOutput, getExpansions

Constructor Details

YoloV5Translator

protected YoloV5Translator(YoloV5Translator.Builder builder)

Constructs an ImageTranslator with the provided builder.

Parameters:

builder - the data to build with

Method Details

builder

public static YoloV5Translator.Builder builder()

Creates a builder to build a YoloV5Translator.

Returns:

a new builder

builder

public static YoloV5Translator.Builder builder(Map<String,?> arguments)

Creates a builder to build a YoloV5Translator with specified arguments.

Parameters:

arguments - arguments to specify builder options

Returns:

a new builder

boxIntersection

protected double boxIntersection(Rectangle a,
 Rectangle b)

boxIou

protected double boxIou(Rectangle a,
 Rectangle b)

boxUnion

protected double boxUnion(Rectangle a,
 Rectangle b)

nms

protected DetectedObjects nms(List<YoloV5Translator.IntermediateResult> list)

overlap

protected double overlap(double x1,
 double w1,
 double x2,
 double w2)

processFromBoxOutput

protected DetectedObjects processFromBoxOutput(NDList list)

processOutput

public DetectedObjects processOutput(TranslatorContext ctx,
 NDList list)

Processes the output NDList to the corresponding output object.

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