Java Utililty Methods BufferedImage Resize

List of utility methods to do BufferedImage Resize

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Description

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

Method

ImagedownsizeImage(Image imgSource, int w, int h)

Resizes the given image using a Graphics2D object backed by a BufferedImage object. 

BufferedImage imgResized = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2dResized = imgResized.createGraphics();
g2dResized.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
g2dResized.drawImage(imgSource, 0, 0, w, h, null);
g2dResized.dispose();
return imgResized;
BufferedImagefitImage(JLabel label, BufferedImage image)
To resize the image to fit in the JLabel, and set it to the JLabel 
int newWidth = label.getWidth();
int newHeight = label.getHeight();
if (newWidth < 1 || newHeight < 1) {
    return null;
BufferedImage resizedImage = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D g = resizedImage.createGraphics();
g.drawImage(image, 0, 0, newWidth, newHeight, null);
...
BufferedImagegetResizedImage(BufferedImage image)
get Resized Image 
if (image == null) {
    return null;
if (image.getWidth() != image.getHeight()) {
    BufferedImage nImage = new BufferedImage(Math.max(image.getWidth(), image.getHeight()),
            Math.max(image.getWidth(), image.getHeight()), 2);
    nImage.getGraphics().drawImage(image, nImage.getWidth() / 2 - image.getWidth() / 2,
            nImage.getHeight() / 2 - image.getHeight() / 2, null);
...
floatgetResizeFactor(BufferedImage source, int maxWidth, int maxHeight)
get Resize Factor 
if (source == null) {
    return 1;
float wfactor = maxWidth == 0 ? 0 : ((float) maxWidth) / source.getWidth();
float hfactor = maxHeight == 0 ? 0 : ((float) maxHeight) / source.getHeight();
float factor = 1;
if (wfactor != 0 && hfactor != 0) {
    factor = Math.min(1, Math.min(wfactor, hfactor));
...
BufferedImageimageResize(BufferedImage image, int width, int height)
Code taken from a stackoverflow answer http://stackoverflow.com/a/14550112/1696114 
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TRANSLUCENT);
Graphics2D g2d = (Graphics2D) bi.createGraphics();
g2d.addRenderingHints(
        new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY));
g2d.drawImage(image, 0, 0, width, height, null);
g2d.dispose();
return bi;
BufferedImagelinearResizeImage(BufferedImage origin, int width, int height)
linear Resize Image 
BufferedImage resizedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = resizedImage.createGraphics();
float xScale = (float) width / origin.getWidth();
float yScale = (float) height / origin.getHeight();
AffineTransform at = AffineTransform.getScaleInstance(xScale, yScale);
g.drawRenderedImage(origin, at);
g.dispose();
return resizedImage;
...
BufferedImageresizeToContainer(BufferedImage imagen, int wCont, int hCont)
Redimensiona una imagen para ajustarla a un contenedor 
widthImage = new ImageIcon(imagen).getIconWidth();
heightImage = new ImageIcon(imagen).getIconHeight();
double scaleW, scaleH; 
if (widthImage > wCont && heightImage > hCont) {
    scaleH = (hCont * 1.0) / heightImage;
    scaleW = scaleH;
    imagen = getScaledImage(imagen, scaleW, scaleH);
    setImageDimension(imagen);
...