Java Utililty Methods Image

List of utility methods to do Image

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Description

The list of methods to do Image are organized into topic(s).

Method

int[] absoluteDifferenceImage(int[] rgb1, int[] rgb2, double scale)
Generate the absolute difference image between two images

if (rgb1.length != rgb2.length)
 throw new RuntimeException("The two images need to have the same number of pixels");
int[] out = new int[rgb1.length];
for (int i = 0; i < rgb1.length; i++) {
 int c1 = rgb1[i];
 int r1 = (c1 >> 16) & 0xff;
 int g1 = (c1 >> 8) & 0xff;
 int b1 = (c1) & 0xff;
...

File checkLosslessImageExt(Component parent, File f)
Optionally validate the file name to have an extension of a lossless image format.

if (f == null)
 return null;
String ext = getExtension(f);
if (ext == null) {
 Object[] options = { "Use .png", "No Extension" };
 String msg = "<html><body><b>Are you sure to not use a file extension?</b><br><br>"
 + "An image file without a proper extension<br>may not be opened correctly by other programs.</body></html>";
 int n = JOptionPane.showOptionDialog(parent, msg, "Save Image", JOptionPane.YES_NO_OPTION,
...

void configureMacOSApplication(String appName, String dockImagePath)
Set common properties and dock image for the given application is we are running on Mac OS X

configureMacOSApplication(appName);
try {
 Class<?> clazz = Class.forName("com.apple.eawt.Application");
 Method method = clazz.getMethod("getApplication", null);
 Object application = method.invoke(null, null);
 Method method2 = application.getClass().getMethod("setDockIconImage", Image.class);
 URL dockImageURL = "".getClass().getResource(dockImagePath);
 Image dockImage = new ImageIcon(dockImageURL).getImage();
...

BufferedImage CreateCopy(Image srcImg)
Create Copy

return ScaleToSize(srcImg, -1, -1);

Cursor createCursor(Image cursorImage, Point hotSpot, String name)
create Cursor

if (hotSpot == null)
 hotSpot = new Point();
Dimension prefDimension = Toolkit.getDefaultToolkit().getBestCursorSize(hotSpot.x, hotSpot.y);
if (hotSpot.x > prefDimension.width - 1)
 hotSpot.x = prefDimension.width - 1;
else if (hotSpot.x < 0)
 hotSpot.x = 0;
if (hotSpot.y > prefDimension.height - 1)
...

Cursor createCursor(Image image, Point hotspot, String name)
Creates a cursor from an image

int w = image.getWidth(null);
int h = image.getHeight(null);
Dimension size = Toolkit.getDefaultToolkit().getBestCursorSize(w, h);
if ((size.width != w) || (size.height != h)) {
 BufferedImage b = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_ARGB);
 Graphics2D g = b.createGraphics();
 g.drawImage(image, 0, 0, null);
 image = b;
...

Image createMemoryImage(int width, int height, Color colour, JComponent someComponent)
Creates a square image of a particular colour.

Image result;
int[] pixels = new int[width * height];
int arraySize = 3;
Color colorArray[] = new Color[arraySize];
for (int i = 0; i < arraySize; i++) {
 colorArray[i] = colour;
byte reds[] = new byte[arraySize];
...

BufferedImage createQualityResizedImage(Image orginalImage, int width, int height, boolean keepRatio)
create Quality Resized Image

return createQualityResizedImage(orginalImage, width, height, false, keepRatio, Color.WHITE, false);

BufferedImage createScaledImage(Image inImage, int inWidth, int inHeight)
Create a scaled and smoothed image according to the specified size

Image smallerImage = inImage.getScaledInstance(inWidth, inHeight, Image.SCALE_SMOOTH);
Image tempImage = new ImageIcon(smallerImage).getImage();
tempImage.getWidth(null);
BufferedImage buffer = new BufferedImage(inWidth, inHeight, BufferedImage.TYPE_INT_RGB);
Graphics buffG = buffer.getGraphics();
buffG.drawImage(smallerImage, 0, 0, inWidth, inHeight, null);
buffG.dispose();
smallerImage = null;
...

ImageIcon createShadowPicture(Image buf)
Creates an ImageIcon with a Shadow

buf = removeTransparency(buf);
BufferedImage splash;
JLabel label = new JLabel();
int width = buf.getWidth(null);
int height = buf.getHeight(null);
int extra = 4;
splash = new BufferedImage(width + extra, height + extra, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) splash.getGraphics();
...