net.sourceforge.jiu.color.adjustment
Class Contrast

java.lang.Object
  net.sourceforge.jiu.ops.Operation
      net.sourceforge.jiu.ops.ImageToImageOperation
          net.sourceforge.jiu.ops.LookupTableOperation
              net.sourceforge.jiu.color.adjustment.Contrast

public class Contrast

extends LookupTableOperation

Adjusts the contrast of an image. The amount of adjustment is given to the constructor as a percentage value between -100 and 100. -100 will make the resulting image middle-gray, 0 will leave it unchanged, 100 will map it to the eight corners of the color cube.

Usage example

This code snippet will reduce image's contrast by 40 percent.

 Contrast contrast = new Contrast();
 contrast.setInputImage(image);
 contrast.setContrast(-40);
 contrast.process();
 PixelImage adjustedImage = contrast.getOutputImage();
 

Author:

Marco Schmidt

Constructor Summary

Contrast()

Method Summary

int	getContrast() Returns the contrast adjustment value associated with this opperation.
void	process() This method does the actual work of the operation.
void	setContrast(int newContrast) Sets the value for contrast adjustment to be used within this operation.

Methods inherited from class net.sourceforge.jiu.ops.LookupTableOperation

getNumTables, getTable, prepareImages, setNumTables, setTable, setTables

Methods inherited from class net.sourceforge.jiu.ops.ImageToImageOperation

canInputAndOutputBeEqual, ensureImagesHaveSameResolution, ensureInputImageIsAvailable, ensureOutputImageResolution, getInputImage, getOutputImage, setCanInputAndOutputBeEqual, setInputImage, setOutputImage

Methods inherited from class net.sourceforge.jiu.ops.Operation

addProgressListener, addProgressListeners, getAbort, removeProgressListener, setAbort, setProgress, setProgress

Methods inherited from class java.lang.Object

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

Constructor Detail

Contrast

public Contrast()

Method Detail

getContrast

public int getContrast()

Returns the contrast adjustment value associated with this opperation. The value lies between -100 and 100 (including both values).

Returns:

contrast adjustment

See Also:

setContrast(int)

process

public void process()
             throws MissingParameterException,
                    WrongParameterException

Description copied from class: Operation

This method does the actual work of the operation. It must be called after all parameters have been given to the operation object.

Overrides:

process in class LookupTableOperation

Throws:

MissingParameterException

WrongParameterException

setContrast

public void setContrast(int newContrast)

Sets the value for contrast adjustment to be used within this operation.

Parameters:

newContrast - new contrast, between -100 and 100 (including both values)

Throws:

IllegalArgumentException - if the new contrast value is not in the above mentioned interval

See Also:

getContrast()