Package ai.djl.basicdataset.cv.classification

Class CaptchaDataset

java.lang.Object

ai.djl.training.dataset.RandomAccessDataset

ai.djl.basicdataset.cv.classification.CaptchaDataset

All Implemented Interfaces:

ai.djl.training.dataset.Dataset

public class CaptchaDataset
extends ai.djl.training.dataset.RandomAccessDataset

A Dataset featuring captcha images.

Each image is a 160x60 grayscale image featuring 5 or 6 digits where each digit ranges from 0-10. The dataset therefore features 6 labels. Each label ranges from 0-11 where 0-10 represent a recognized digit and 11 indicates that the value is not a digit (size 5 and not 6).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CaptchaDataset.Builder	A builder for a CaptchaDataset.

Nested classes/interfaces inherited from class ai.djl.training.dataset.RandomAccessDataset

ai.djl.training.dataset.RandomAccessDataset.BaseBuilder<T extends ai.djl.training.dataset.RandomAccessDataset.BaseBuilder<T>>

Nested classes/interfaces inherited from interface ai.djl.training.dataset.Dataset

ai.djl.training.dataset.Dataset.Usage

Field Summary

Fields

Modifier and Type	Field	Description
static int	CAPTCHA_LENGTH
static int	CAPTCHA_OPTIONS
static int	IMAGE_HEIGHT
static int	IMAGE_WIDTH

Fields inherited from class ai.djl.training.dataset.RandomAccessDataset

dataBatchifier, device, labelBatchifier, limit, pipeline, prefetchNumber, sampler, targetPipeline

Constructor Summary

Constructors

Constructor	Description
CaptchaDataset(CaptchaDataset.Builder builder)	Creates a new instance of CaptchaDataset.

Method Summary

Modifier and Type	Method	Description
protected long	availableSize()
static CaptchaDataset.Builder	builder()	Creates a builder to build a CaptchaDataset.
ai.djl.training.dataset.Record	get(ai.djl.ndarray.NDManager manager, long index)
void	prepare(ai.djl.util.Progress progress)

Methods inherited from class ai.djl.training.dataset.RandomAccessDataset

getData, getData, getData, getData, newSubDataset, newSubDataset, randomSplit, size, subDataset, subDataset, subDataset, subDataset, toArray

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.djl.training.dataset.Dataset

matchingTranslatorOptions, prepare

Field Detail

IMAGE_WIDTH

public static final int IMAGE_WIDTH

See Also:

Constant Field Values

IMAGE_HEIGHT

public static final int IMAGE_HEIGHT

See Also:

Constant Field Values

CAPTCHA_LENGTH

public static final int CAPTCHA_LENGTH

See Also:

Constant Field Values

CAPTCHA_OPTIONS

public static final int CAPTCHA_OPTIONS

See Also:

Constant Field Values

Constructor Detail

CaptchaDataset

public CaptchaDataset(CaptchaDataset.Builder builder)

Creates a new instance of CaptchaDataset.

Parameters:

builder - a builder with the necessary configurations

Method Detail

builder

public static CaptchaDataset.Builder builder()

Creates a builder to build a CaptchaDataset.

Returns:

a new builder

get

public ai.djl.training.dataset.Record get(ai.djl.ndarray.NDManager manager,
                                          long index)
                                   throws java.io.IOException

Specified by:

get in class ai.djl.training.dataset.RandomAccessDataset

Throws:

java.io.IOException

availableSize

protected long availableSize()

Specified by:

availableSize in class ai.djl.training.dataset.RandomAccessDataset

prepare

public void prepare(ai.djl.util.Progress progress)
             throws java.io.IOException

Throws:

java.io.IOException