Package seamcarving

Class SeamCarver

java.lang.Object

seamcarving.SeamCarver

public class SeamCarver
extends Object

Seam carving, an approach for content-aware image resizing. Given a Picture, an EnergyFunction, and a SeamFinder algorithm, removeHorizontal() or removeVertical() seams from the picture.

See Also:

Picture, EnergyFunction, SeamFinder

Field Summary

Fields

Modifier and Type	Field	Description
private EnergyFunction	f	The EnergyFunction for determining the minimum-cost seam.
private static String	INPUT_PATH	Path to the input image.
private double	lastRemovedSeamEnergy	The energy for the last-removed seam, or NaN if no seam has been removed.
private static String	OUTPUT_PATH	Path to the output image.
private Picture	picture	The Picture.
private SeamFinder	seamFinder	The SeamFinder implementation.

Constructor Summary

Constructors

Constructor	Description
SeamCarver(File file, EnergyFunction f, SeamFinder seamFinder)	Constructs a seam carver by reading the Picture from the file, using the given EnergyFunction and SeamFinder implementations.

Method Summary

Modifier and Type	Method	Description
double	lastRemovedSeamEnergy()	Returns the energy of the last-removed seam, or NaN if no seam has been removed yet.
static void	main(String[] args)
private Picture	picture()	Returns a copy of the current picture.
List<Integer>	removeHorizontal()	Removes and returns a minimum-cost horizontal seam from the picture.
List<Integer>	removeVertical()	Removes and returns a minimum-cost vertical seam from the picture.
private static void	validate(Picture picture, List<Integer> seam)	Checks that the seam is a valid horizontal seam in the picture.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INPUT_PATH

private static final String INPUT_PATH

Path to the input image.

See Also:

Constant Field Values

OUTPUT_PATH

private static final String OUTPUT_PATH

Path to the output image.

See Also:

Constant Field Values

f

private final EnergyFunction f

The EnergyFunction for determining the minimum-cost seam.

seamFinder

private final SeamFinder seamFinder

The SeamFinder implementation.

picture

private Picture picture

The Picture.

lastRemovedSeamEnergy

private double lastRemovedSeamEnergy

The energy for the last-removed seam, or NaN if no seam has been removed.

Constructor Detail

SeamCarver

public SeamCarver(File file,
                  EnergyFunction f,
                  SeamFinder seamFinder)
           throws IOException

Constructs a seam carver by reading the Picture from the file, using the given EnergyFunction and SeamFinder implementations.

Parameters:

file - the file path to the image.

f - the EnergyFunction.

seamFinder - the SeamFinder.

Throws:

IOException - if an error occurs during reading.

Method Detail

main

public static void main(String[] args)
                 throws IOException

Throws:

IOException

validate

private static void validate(Picture picture,
                             List<Integer> seam)

Checks that the seam is a valid horizontal seam in the picture.

Parameters:

picture - the input picture.

seam - the seam to remove.

picture

private Picture picture()

Returns a copy of the current picture.

Returns:

a copy of the current picture.

removeHorizontal

public List<Integer> removeHorizontal()

Removes and returns a minimum-cost horizontal seam from the picture.

Returns:

a minimum-cost horizontal seam.

removeVertical

public List<Integer> removeVertical()

Removes and returns a minimum-cost vertical seam from the picture.

Returns:

a minimum-cost vertical seam.

lastRemovedSeamEnergy

public double lastRemovedSeamEnergy()

Returns the energy of the last-removed seam, or NaN if no seam has been removed yet.

Returns:

the energy of the last-removed seam, or NaN if no seam has been removed yet.