net.sourceforge.jiu.color.reduction
Class ReduceToBilevelThreshold
java.lang.Object
net.sourceforge.jiu.ops.Operation
net.sourceforge.jiu.ops.ImageToImageOperation
net.sourceforge.jiu.color.reduction.ReduceToBilevelThreshold
public class ReduceToBilevelThreshold
- extends ImageToImageOperation
Reduces a GrayIntegerImage
to a
BilevelImage
by setting all values below
a certain threshold value to black and everything else to white.
Default value
If no threshold is specified via setThreshold(int)
, this operation
uses a default value of (IntegerImage.getMaxSample(int)
+ 1) / 2.
Usage example
This example sets all values below 33 percent luminance to black,
everything else to white.
GrayIntegerImage image = ...;
ReduceToBilevelThreshold red = new ReduceToBilevelThreshold();
red.setInputImage(image);
red.setThreshold(image.getMaxSample(0) / 3);
red.process();
BilevelImage reducedImage= (BilevelImage)red.getOutputImage();
- Author:
- Marco Schmidt
Method Summary |
Integer |
getThreshold()
Returns the current threshold value, or null if
none was specified and the operation's process method was not
run yet. |
void |
process()
This method does the actual work of the operation. |
void |
setThreshold(int newThreshold)
Sets a new threshold value. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ReduceToBilevelThreshold
public ReduceToBilevelThreshold()
getThreshold
public Integer getThreshold()
- Returns the current threshold value, or
null
if
none was specified and the operation's process method was not
run yet.
- Returns:
- threshold value
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 Operation
- Throws:
MissingParameterException
- if any mandatory parameter was not given to the operation
WrongParameterException
- if at least one of the input parameters was
not initialized appropriately (values out of the valid interval, etc.)
setThreshold
public void setThreshold(int newThreshold)
- Sets a new threshold value.
- Parameters:
newThreshold
- the new threshold value to be used for this operation
- Throws:
IllegalArgumentException
- if the threshold value is negative
Copyright © 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Marco Schmidt