jjil.algorithm
Class GrayCrop

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

public class GrayCrop
extends PipelineStage

Pipeline stage crops a Gray8Image to a given rectangular cropping window.

Author:

webb

Constructor Summary

GrayCrop(int x, int y, int width, int height)
Creates a new instance of GrayCrop.

Method Summary

int	getHeight() Gets the cropping window height
int	getLeft() Gets the cropping window left edge
int	getTop() Gets the cropping window top
int	getWidth() Gets the cropping window width
void	push(Image image) Crops the input gray image to the cropping window that was specified in the constructor.
void	setWindow(int x, int y, int width, int height) Change the cropping window.
java.lang.String	toString() Return a string describing the cropping 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

GrayCrop

public GrayCrop(int x,
                int y,
                int width,
                int height)
         throws Error

Creates a new instance of GrayCrop. The cropping window is specified here.

Parameters:

x - left edge of cropping window

y - top edge of cropping window

width - width of cropping window

height - height of cropping window

Throws:

Error - if the top left corner of the window is negative, or the window area is non-positive.

Method Detail

push

public void push(Image image)
          throws Error

Crops the input gray image to the cropping window that was specified in the constructor.

Specified by:

push in class PipelineStage

Parameters:

image - the input image.

Throws:

Error - if the cropping window extends outside the input image, or the input image is not a Gray8Image.

getHeight

public int getHeight()

Gets the cropping window height

Returns:

the cropping window height

getLeft

public int getLeft()

Gets the cropping window left edge

Returns:

the cropping window left edge

getTop

public int getTop()

Gets the cropping window top

Returns:

the cropping window top

getWidth

public int getWidth()

Gets the cropping window width

Returns:

the cropping window width

setWindow

public void setWindow(int x,
                      int y,
                      int width,
                      int height)
               throws Error

Change the cropping window.

Parameters:

x - left edge of cropping window

y - top edge of cropping window

width - width of cropping window

height - height of cropping window

Throws:

Error - if the top left corner of the window is negative, or the window area is non-positive.

toString

public java.lang.String toString()

Return a string describing the cropping operation.

Overrides:

toString in class java.lang.Object

Returns:

the string describing the cropping operation.