org.datavec.image.transform

Class EqualizeHistTransform

java.lang.Object

org.datavec.image.transform.BaseImageTransform

org.datavec.image.transform.EqualizeHistTransform

All Implemented Interfaces:

ImageTransform

public class EqualizeHistTransform
extends BaseImageTransform

"Histogram Equalization equalizes the intensity distribution of an image or flattens the intensity distribution curve. Used to improve the contrast of an image."

Field Summary

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

converter, currentImage, random

Constructor Summary

Constructors

Constructor and Description
EqualizeHistTransform() Default transforms histogram equalization for CV_BGR2GRAY (grayscale)
EqualizeHistTransform(int conversionCode) Return contrast normalized object
EqualizeHistTransform(Random random, int conversionCode) Return contrast normalized object

Method Summary

Modifier and Type	Method and Description
protected ImageWritable	doTransform(ImageWritable image, Random random) Takes an image and returns a transformed 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

Constructor Detail

EqualizeHistTransform

public EqualizeHistTransform()

Default transforms histogram equalization for CV_BGR2GRAY (grayscale)

EqualizeHistTransform

public EqualizeHistTransform(int conversionCode)

Return contrast normalized object

Parameters:

conversionCode - to transform,

EqualizeHistTransform

public EqualizeHistTransform(Random random,
                             int conversionCode)

Return contrast normalized object

Parameters:

random - Random

conversionCode - to transform,

Method Detail

doTransform

protected ImageWritable doTransform(ImageWritable image,
                                    Random random)

Takes an image and returns a transformed image. Uses the random object in the case of random transformations.

Specified by:

doTransform in class BaseImageTransform

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

Parameters:

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

Returns:

transformed coordinates