jjil.algorithm
Class GrayShrink

java.lang.Object
  jjil.core.PipelineStage
      jjil.algorithm.GrayShrink

public class GrayShrink
extends PipelineStage

Shrinks an input Gray8Image to a given new size. The shrinking is done with proper averaging so each output pixel is the average of the corresponding rectangular region in the input.

Author:

webb

Constructor Summary

GrayShrink(int cWidth, int cHeight)
Creates a new instance of GrayRectStretch.

Method Summary

int	getHeight() Gets current target height
int	getWidth() Gets current target width
void	push(Image image) Process an input Gray8Image, producing a new shrunk output image.
void	setHeight(int cHeight) Changes target height
void	setWidth(int cWidth) Changes target width
java.lang.String	toString() Return a string describing the shrinking operation.

Methods inherited from class jjil.core.PipelineStage

getFront, isEmpty

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

GrayShrink

public GrayShrink(int cWidth,
                  int cHeight)
           throws Error

Creates a new instance of GrayRectStretch.

Parameters:

cWidth - new image width

cHeight - new image height

Throws:

Error - if either is less than or equal to zero.

Method Detail

getHeight

public int getHeight()

Gets current target height

Returns:

current height

getWidth

public int getWidth()

Gets current target width

Returns:

current width

push

public void push(Image image)
          throws Error

Process an input Gray8Image, producing a new shrunk output image.

Specified by:

push in class PipelineStage

Parameters:

image - The input Gray8Image.

Throws:

Error - if input is not a Gray8Image, or the input image size is smaller (either horizontally or vertically) than the desired size.

setHeight

public void setHeight(int cHeight)
               throws Error

Changes target height

Parameters:

cHeight - the new target height.

Throws:

Error - if height is not positive

setWidth

public void setWidth(int cWidth)
              throws Error

Changes target width

Parameters:

cWidth - the new target width.

Throws:

Error - if height is not positive

toString

public java.lang.String toString()

Return a string describing the shrinking operation.

Overrides:

toString in class java.lang.Object

Returns:

the string describing the shrinking operation.