Package net.sourceforge.jiu.geometry
Class Crop
java.lang.Object
net.sourceforge.jiu.ops.Operation
net.sourceforge.jiu.ops.ImageToImageOperation
net.sourceforge.jiu.geometry.Crop
Copies a rectangular area of one image to another image that is exactly as large
as that rectangular area.
Works with all image data classes implementing
IntegerImage
.
Make sure to use zero-based parameters when defining the bounds with
setBounds(int, int, int, int)
!
Usage example
In this example we assume that the input image is larger than 20 pixels in both directions. Ten pixels will be removed from any of its four borders.PixelImage image = ...; // something implementing IntegerImage Crop crop = new Crop(); crop.setInputImage(image); crop.setBounds(10, 10, image.getWidth() - 9, image.getHeight() - 9); crop.process(); PixelImage croppedImage = crop.getOutputImage();
- Author:
- Marco Schmidt
-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate void
void
process()
This method does the actual work of the operation.private void
process
(IntegerImage in, IntegerImage out) void
setBounds
(int x1, int y1, int x2, int y2) Specify the rectangular section of the original image that is to be copied to the output image by this operation.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
-
Field Details
-
x1
private int x1 -
y1
private int y1 -
x2
private int x2 -
y2
private int y2
-
-
Constructor Details
-
Crop
public Crop()
-
-
Method Details
-
checkBounds
- Throws:
WrongParameterException
-
process
-
process
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 classOperation
- Throws:
MissingParameterException
- if any mandatory parameter was not given to the operationWrongParameterException
- if at least one of the input parameters was not initialized appropriately (values out of the valid interval, etc.)
-
setBounds
Specify the rectangular section of the original image that is to be copied to the output image by this operation. Note that the arguments are not checked directly against any input image that may have been provided to this Crop object, that checking is done later inprocess()
. If any of the arguments provided here are outside of the input image's resolution (e.g. x1 == 100 although the input image's width is only 60), aWrongParameterException
will be thrown from withinprocess()
.Note that the arguments to this method are zero-based, so the first column and row are 0, the second 1, the third 2, and so on. If you have a image that is 200 pixels wide and 100 pixels high, values from 0 to 199 are valid for the x arguments, and values from 0 to 99 are valid for the vertical direction.
- Parameters:
x1
- horizontal position of upper left corner of the rectangley1
- vertical position of upper left corner of the rectanglex2
- horizontal position of lower right corner of the rectangley2
- vertical position of lower right corner of the rectangle- Throws:
IllegalArgumentException
- if any of the arguments is negative or x1 larger than x2 or y1 larger than y2
-