Java Utililty Methods BufferedImage Operation

List of utility methods to do BufferedImage Operation

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Description

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

Method

voidtileStretchPaint(Graphics g, Component component, BufferedImage image, Insets insets)
Draws an image on top of a component by doing a 3x3 grid stretch of the image using the specified insets. 
int left = insets.left;
int right = insets.right;
int top = insets.top;
int bottom = insets.bottom;
g.drawImage(image, 0, 0, left, top, 0, 0, left, top, null);
g.drawImage(image, left, 0, component.getWidth() - right, top, left, 0, image.getWidth() - right, top,
        null);
g.drawImage(image, component.getWidth() - right, 0, component.getWidth(), top, image.getWidth() - right, 0,
...
BufferedImagetilt(BufferedImage image, double angle)
tilt 
double sin = Math.abs(Math.sin(angle));
double cos = Math.abs(Math.cos(angle));
int w = image.getWidth();
int h = image.getHeight();
int neww = (int) Math.floor(w * cos + h * sin);
int newh = (int) Math.floor(h * cos + w * sin);
GraphicsConfiguration gc = getDefaultConfiguration();
BufferedImage result = gc.createCompatibleImage(neww, newh, Transparency.TRANSLUCENT);
...
BufferedImagetintImage(BufferedImage src, Color color, float tintOpacity)
tint Image 
BufferedImage img = new BufferedImage(src.getWidth(), src.getHeight(), BufferedImage.TRANSLUCENT);
Graphics2D g2d = img.createGraphics();
g2d.drawImage(src, null, 0, 0);
g2d.setColor(
        new Color(color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f, tintOpacity));
Raster data = src.getData();
for (int x = data.getMinX(); x < data.getWidth(); x++) {
    for (int y = data.getMinY(); y < data.getHeight(); y++) {
...
StringunweaveFrom(BufferedImage bufferedImage)
Unweave a secret message from the given BufferedImage . 
int width = bufferedImage.getWidth();
int height = bufferedImage.getHeight();
int messageLength = bufferedImage.getRGB(0, 0) & 0xff;
StringBuilder sb = new StringBuilder();
for (int row = 0, j = 0, i = 1; row < height; row++) {
    for (int column = 0; column < width && j < messageLength; column++, i++) {
        if (i % 11 == 0) {
            int result = bufferedImage.getRGB(column, row);
...
voidupdateImageSpecifications(BufferedImage bufferedImage)
Updated the local (static) variables holding the image, the color-model of the image, the raster of the image, and the height and width of the image-raster. 
image = bufferedImage;
imageColorModel = image.getColorModel();
imageRaster = image.getRaster();
imageHeight = imageRaster.getHeight();
imageWidth = imageRaster.getWidth();
booleanvalidateSelectionRectangle(BufferedImage image, Rectangle selection)
validate the selection rectangle against the current image position and size 
return selection != null && selection.x >= 0 && selection.y >= 0 && selection.width > 0
        && selection.height > 0 && selection.x + selection.width <= image.getWidth()
        && selection.y + selection.height <= image.getHeight();
voidverticalGradient(BufferedImage image, Graphics2D g2d, Color... colors)
vertical Gradient 
int miniHeight = image.getHeight() / (colors.length - 1);
for (int i = 1; i < colors.length; i++) {
    Point start = new Point(0, (i - 1) * miniHeight);
    Point end = new Point(0, i * miniHeight);
    gradientPaint(g2d, start, colors[i - 1], end, colors[i], start.x, start.y, image.getWidth(), end.y);
BufferedImagewaterMarkImage(final BufferedImage image, final String text)
Watermarks the given image with given text. 
if (image == null) {
    throw new IllegalArgumentException("\"image\" param cannot be null.");
final BufferedImage waterMarked = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
final Graphics2D imageG = waterMarked.createGraphics();
imageG.drawImage(image, null, 0, 0);
imageG.dispose();
final Graphics2D g = waterMarked.createGraphics();
...
BufferedImageweaveInto(BufferedImage bufferedImage, String message)
Weave the given secret message into the given BufferedImage . 
int width = bufferedImage.getWidth();
int height = bufferedImage.getHeight();
if (message.length() > 255) {
    throw new IllegalArgumentException("Given message is to large(max 255 characters)");
if (message.length() * 11 > width * height) {
    throw new IllegalArgumentException("Given image is to small");
byte[] messageBytes = message.getBytes();
int messageLengthDecode = bufferedImage.getRGB(0, 0) >> 8 << 8;
messageLengthDecode |= message.length();
bufferedImage.setRGB(0, 0, messageLengthDecode);
for (int i = 1, messagePosition = 0, row = 0, j = 0; row < height; row++) {
    for (int column = 0; column < width && j < messageBytes.length; column++, i++) {
        if (i % 11 == 0) {
            int rgb = bufferedImage.getRGB(column, row);
            int a = rgb >> 24 & 0xff;
            int r = (rgb >> 16 & 0xff) >> 3 << 3;
            r = r | messageBytes[messagePosition] >> 5;
            int g = (rgb >> 8 & 0xff) >> 3 << 3;
            g = g | messageBytes[messagePosition] >> 2 & 7;
            int b = (rgb & 0xff) >> 2 << 2;
            b = b | messageBytes[messagePosition] & 0x3;
            rgb = 0;
            rgb = rgb | a << 24;
            rgb = rgb | r << 16;
            rgb = rgb | g << 8;
            rgb = rgb | b;
            bufferedImage.setRGB(column, row, rgb);
            messagePosition++;
            j++;
return bufferedImage;