Package dev.aherscu.qa.testing.utils

Class ImageUtils

java.lang.Object

dev.aherscu.qa.testing.utils.ImageUtils

public final class ImageUtils
extends Object

Image manipulation utilities.

Author:

Adrian Herscu

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImageUtils.Pipeline	Image transformation pipeline.

Field Summary

Fields

Modifier and Type	Field	Description
static Map<RenderingHints.Key,Object>	DEFAULT_RENDERING_HINTS	Rendering hints for best quality with scaling.
static IndexColorModel	FOUR_BIT_COLOR_MODEL	Four-bit color model.
static IndexColorModel	GREY_SCALE_COLOR_MODEL	Gray scale color model.

Method Summary

Modifier and Type	Method	Description
static org.apache.commons.lang3.tuple.Pair<BufferedImage,BufferedImage>	adapt(org.apache.commons.lang3.tuple.Pair<BufferedImage,BufferedImage> pair)	Makes two images same size by scaling down the image with bigger area.
static double	areaOf(BufferedImage image)
static BufferedImage	reduce(BufferedImage inputImage, IndexColorModel indexColorModel)	Reduces the color palette of specified image.
static BufferedImage	scale(BufferedImage inputImage, double widthScale, double heightScale)	Scales a specified image using dedicated library.
static BufferedImage	scale(BufferedImage inputImage, float widthScale, float heightScale, Map<RenderingHints.Key,Object> hints)	Scales a specified image using plain calls to Graphics2D and AffineTransform.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_RENDERING_HINTS

public static final Map<RenderingHints.Key,Object> DEFAULT_RENDERING_HINTS

Rendering hints for best quality with scaling.

See Also:

scale(BufferedImage, float, float, Map)

FOUR_BIT_COLOR_MODEL

public static final IndexColorModel FOUR_BIT_COLOR_MODEL

Four-bit color model.

GREY_SCALE_COLOR_MODEL

public static final IndexColorModel GREY_SCALE_COLOR_MODEL

Gray scale color model.

Method Detail

reduce

public static BufferedImage reduce(BufferedImage inputImage,
                                   IndexColorModel indexColorModel)

Reduces the color palette of specified image.

Parameters:

inputImage - the image to reduce

indexColorModel - the color model to apply

Returns:

the reduced image

scale

public static BufferedImage scale(BufferedImage inputImage,
                                  float widthScale,
                                  float heightScale,
                                  Map<RenderingHints.Key,Object> hints)

Scales a specified image using plain calls to Graphics2D and AffineTransform.

Not best quality when scaling down.

Parameters:

inputImage - the image to scale

widthScale - width scale factor

heightScale - height scale factor

hints - rendering hints

Returns:

the scaled image

See Also:

DEFAULT_RENDERING_HINTS

scale

public static BufferedImage scale(BufferedImage inputImage,
                                  double widthScale,
                                  double heightScale)

Scales a specified image using dedicated library.

Good quality when scaling down.

Parameters:

inputImage - the image to scale

widthScale - the width scale factor

heightScale - the height scale factor

Returns:

the scaled image

areaOf

public static double areaOf(BufferedImage image)

Parameters:

image - the image

Returns:

the area of image

adapt

public static org.apache.commons.lang3.tuple.Pair<BufferedImage,BufferedImage> adapt(org.apache.commons.lang3.tuple.Pair<BufferedImage,BufferedImage> pair)

Makes two images same size by scaling down the image with bigger area.

Parameters:

pair - images to adapt

Returns:

adapted images