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

BufferedImagecomposite(BufferedImage bg, BufferedImage fg)
composite 
BufferedImage result = copyImage(bg);
Graphics g = result.getGraphics();
g.drawImage(fg, 0, 0, null);
g.dispose();
return result;
double[][]computeBrightnesses(final BufferedImage image)
compute Brightnesses 
final int width = image.getWidth();
final int height = image.getHeight();
final double[][] brightnesses = new double[width][height];
for (int i = 0; i < width; ++i) {
    for (int j = 0; j < height; ++j) {
        brightnesses[i][j] = getBrightness(image, i, j);
return brightnesses;
voidcomputeTrimmedBounds(BufferedImage image, Rectangle tbounds)
Computes the bounds of the smallest rectangle that contains all non-transparent pixels of this image. 
int width = image.getWidth(), height = image.getHeight();
int firstrow = -1, lastrow = -1, minx = width, maxx = 0;
for (int yy = 0; yy < height; yy++) {
    int firstidx = -1, lastidx = -1;
    for (int xx = 0; xx < width; xx++) {
        int argb = image.getRGB(xx, yy);
        if ((argb >> 24) == 0) {
            continue;
...
BufferedImageconformImageToInt(BufferedImage in)
conform Image To Int 
return convertImage(in, BufferedImage.TYPE_INT_RGB);
BufferedImagecontrast(BufferedImage src, float scaleFactor)
Contrasts image. 
RescaleOp rop = new RescaleOp(scaleFactor, 0, null);
return rop.filter(src, null);
BufferedImagecriarImagemCompativel(BufferedImage original, int largura, int altura, boolean manterQualidade)
criar Imagem Compativel 
GraphicsConfiguration graphicsConfiguration = GraphicsEnvironment.getLocalGraphicsEnvironment()
        .getDefaultScreenDevice().getDefaultConfiguration();
BufferedImage imagemCompativel = graphicsConfiguration.createCompatibleImage(largura, altura,
        original.getTransparency());
Graphics2D g = (Graphics2D) imagemCompativel.getGraphics();
if (manterQualidade) {
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
g.drawImage(original, 0, 0, largura, altura, null);
g.dispose();
return imagemCompativel;
BufferedImagecutToSquare(BufferedImage src)
cut To Square 
int width = src.getWidth();
int height = src.getHeight();
if (width == height)
    return src;
BufferedImage result = null;
if (width > height) {
    int cut = (width - height) / 2;
    result = src.getSubimage(cut, 0, height, height);
...
BufferedImagecylindricalMapping(BufferedImage img, double f)
cylindrical Mapping 
if (img == null) {
    return null;
int w = img.getWidth();
int h = img.getHeight();
BufferedImage out = new BufferedImage(w, h, img.getType());
int x0 = (int) Math.floor(w / 2) + 1;
int y0 = (int) Math.floor(h / 2) + 1;
...
voiddarkenImage(final BufferedImage image, final float darken)
Darkens specified BufferedImage 
final Graphics2D g2d = image.createGraphics();
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, darken));
g2d.setPaint(Color.BLACK);
g2d.fillRect(0, 0, image.getWidth(), image.getHeight());
g2d.dispose();
BufferedImagedeclareNewBufferedImage(int x, int y)
declare New Buffered Image 
BufferedImage imgOut = new BufferedImage(x, y, BufferedImage.TYPE_INT_RGB);
return imgOut;