org.datavec.image.transform

Class RandomCropTransform

java.lang.Object

org.datavec.image.transform.BaseImageTransform<org.bytedeco.opencv.opencv_core.Mat>

org.datavec.image.transform.RandomCropTransform

All Implemented Interfaces:

ImageTransform

public class RandomCropTransform
extends BaseImageTransform<org.bytedeco.opencv.opencv_core.Mat>

Randomly crops an image to a desired output size. Will determine if output size is valid, otherwise will throw an error.

Author:

Justin Long (@crockpotveggies)

Field Summary

Fields

Modifier and Type	Field and Description
protected int	outputHeight
protected int	outputWidth
protected Random	rng

Fields inherited from class org.datavec.image.transform.BaseImageTransform

converter, currentImage, random

Constructor Summary

Constructors

Constructor and Description
RandomCropTransform(int height, int width)
RandomCropTransform(long seed, int height, int width)
RandomCropTransform(Random random, long seed, int height, int width)

Method Summary

Modifier and Type	Method and Description
protected ImageWritable	doTransform(ImageWritable image, Random random) Takes an image and returns a randomly cropped image.
float[]	query(float... coordinates) Transforms the given coordinates using the parameters that were used to transform the last image.

Methods inherited from class org.datavec.image.transform.BaseImageTransform

getCurrentImage, transform, transform

Methods inherited from class java.lang.Object

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

Field Detail

outputHeight

protected int outputHeight

outputWidth

protected int outputWidth

rng

protected Random rng

Constructor Detail

RandomCropTransform

public RandomCropTransform(int height,
                           int width)

RandomCropTransform

public RandomCropTransform(long seed,
                           int height,
                           int width)

RandomCropTransform

public RandomCropTransform(Random random,
                           long seed,
                           int height,
                           int width)

Method Detail

doTransform

protected ImageWritable doTransform(ImageWritable image,
                                    Random random)

Takes an image and returns a randomly cropped image.

Specified by:

doTransform in class BaseImageTransform<org.bytedeco.opencv.opencv_core.Mat>

Parameters:

image - to transform, null == end of stream

random - object to use (or null for deterministic)

Returns:

transformed image

query

public float[] query(float... coordinates)

Description copied from interface: ImageTransform

Transforms the given coordinates using the parameters that were used to transform the last image.

Specified by:

query in interface ImageTransform

Overrides:

query in class BaseImageTransform<org.bytedeco.opencv.opencv_core.Mat>

Parameters:

coordinates - to transforms (x1, y1, x2, y2, ...)

Returns:

transformed coordinates