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net.sourceforge.jiu.color.adjustment
Class Contrast

java.lang.Object
  extended bynet.sourceforge.jiu.ops.Operation
      extended bynet.sourceforge.jiu.ops.ImageToImageOperation
          extended bynet.sourceforge.jiu.ops.LookupTableOperation
              extended bynet.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()

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Copyright © 2000, 2001, 2002, 2003, 2004 Marco Schmidt