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cropping in image into an cricle

I want to crop an image which is rectangular , into a circle of specific diameter. I am able to do it through graphics2D, and I get the image saved, but, when I read it through ImagIO, i get the full image again inspite to it being cropped to a circle. the image is a masked circle, and evrything outside is discarded like a mask. I am attaching the image here. inspite of it being clipped, i get the full image rendered, when i read it through imageIO. here is the code.
int w = bufferedImage.getWidth();
int h = bufferedImage.getHeight();
BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = output.createGraphics();
Area areaOval = new Area(new Arc2D.Double(0, 0, w, w, 0, 360,
Arc2D.PIE));
Shape shapeClipSave = g2.getClip();
g2.setClip(areaOval);
g2.drawImage(bufferedImage, 0, 0, null);
g2.setClip(shapeClipSave);
bufferedImage=output;
try {
ImageIO.write(bufferedImage,"png", new File("D:/new.png"));
bufferedImage= ImageIO.read(new File("D:/new.png"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
g2.dispose();

Here's my take. I rewrote some parts for performance and better fidelity (I couldn't get the edges of the circular area antialiased using clip). Although your code should also work, in general.
public static void main(String[] args) throws IOException {
BufferedImage image = ImageIO.read(new File(args[0]));
// Remove odd borders (imgur issue?)... Remove this if your input doesn't have borders
image = image.getSubimage(10, 0, image.getWidth() - 20, image.getHeight() - 10);
int w = image.getWidth();
int h = image.getHeight();
image = createCircular(image, Math.min(w, h));
if (!ImageIO.write(image, "png", new File("new.png"))) {
System.err.println("Could not write PNG format");
System.exit(1);
}
image = ImageIO.read(new File("new.png"));
showItAll(image);
}
private static BufferedImage createCircular(BufferedImage image, int size) {
BufferedImage output = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = output.createGraphics();
try {
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.fillOval(0, 0, size, size);
g2.setComposite(AlphaComposite.SrcIn);
g2.drawImage(image, 0, 0, null);
}
finally {
g2.dispose();
}
return output;
}
private static void showItAll(BufferedImage image) {
JFrame frame = new JFrame("test");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setContentPane(new JPanel() {
{
setBackground(Color.ORANGE);
}
});
frame.getContentPane().add(new JLabel(new ImageIcon(image)));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
Using your giraffe as input, I got the following output, the orange background is just to make the transparent parts clearly visible:
Alternatively, if you use the TwelveMonkeys library and the Adobe Path Support module, you can replace:
image = createCircular(image, Math.min(w, h));
with the following:
int size = Math.min(w, h);
image = Paths.applyClippingPath(new Ellipse2D.Float(0, 0, 1, 1),
image.getSubimage(0, 0, size, size));
Just be aware that the shape coordinates are relative to the size of the image, not in pixels.

concat image file not able to create

I try to join two images. But not able to create it.
I am not able to understand what is the problem in the below code.
It is not able to create the concat.jpg file.
BufferedImage image = ImageIO.read(mainFile);
BufferedImage image1 = ImageIO.read(fileToMerge);
int width = Math.max(image.getWidth() , image1.getWidth());
int height = Math.max(image.getHeight() , image1.getHeight());
log.info("width {}", width);
log.info("height {}", height);
BufferedImage concatImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics2D = concatImage.createGraphics();
graphics2D.drawImage(image, 0, image.getHeight(), null);
graphics2D.drawImage(image1, 0 , image1.getHeight(), null);
ImageIO.write(concatImage, "jpg", new File(Constants.LOCAL_FOLDER + "/concat.jpg"));

You want the height of concatImage to be the combined height of image and image1.
You want to draw image at coordinates (0,0) and you want to draw image1 at x = 0 and y = height of image
Try the following.
BufferedImage image = ImageIO.read(mainFile);
BufferedImage image1 = ImageIO.read(fileToMerge);
int width = Math.max(image.getWidth() , image1.getWidth());
int height = image.getHeight() + image1.getHeight();
log.info("width {}", width);
log.info("height {}", height);
BufferedImage concatImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics2D = concatImage.createGraphics();
graphics2D.drawImage(image, 0, 0, null);
graphics2D.drawImage(image1, 0, image.getHeight(), null);
ImageIO.write(concatImage, "jpg", new File(Constants.LOCAL_FOLDER + "/concat.jpg"));
Note that you should call graphics2D.dispose() when you no longer need to use it.

Add watermark to image

I'm trying to add watermark to an image on my website. The way I want it to work is to show the watermark when the image is downloaded or shown on other websites. On my website I want to show it without the watermark. It would be awesome if the watermark is placed on the picture. Is this possible to do the above mentioned by using some picture meta-data or http headers for example? Or is it impossible to perform this and should I do it by adding a footer upon upload and hiding it?

You can reference the follow link:
Add text watermark to image
static void addTextWatermark(String text, File sourceImageFile, File destImageFile) {
try {
BufferedImage sourceImage = ImageIO.read(sourceImageFile);
Graphics2D g2d = (Graphics2D) sourceImage.getGraphics();
// initializes necessary graphic properties
AlphaComposite alphaChannel = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.1f);
g2d.setComposite(alphaChannel);
g2d.setColor(Color.BLUE);
g2d.setFont(new Font("Arial", Font.BOLD, 64));
FontMetrics fontMetrics = g2d.getFontMetrics();
Rectangle2D rect = fontMetrics.getStringBounds(text, g2d);
// calculates the coordinate where the String is painted
int centerX = (sourceImage.getWidth() - (int) rect.getWidth()) / 2;
int centerY = sourceImage.getHeight() / 2;
// paints the textual watermark
g2d.drawString(text, centerX, centerY);
ImageIO.write(sourceImage, "png", destImageFile);
g2d.dispose();
System.out.println("The tex watermark is added to the image.");
} catch (IOException ex) {
System.err.println(ex);
}
}
Add image watermark to image
static void addImageWatermark(File watermarkImageFile, File sourceImageFile, File destImageFile) {
try {
BufferedImage sourceImage = ImageIO.read(sourceImageFile);
BufferedImage watermarkImage = ImageIO.read(watermarkImageFile);
// initializes necessary graphic properties
Graphics2D g2d = (Graphics2D) sourceImage.getGraphics();
AlphaComposite alphaChannel = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.3f);
g2d.setComposite(alphaChannel);
// calculates the coordinate where the image is painted
int topLeftX = (sourceImage.getWidth() - watermarkImage.getWidth()) / 2;
int topLeftY = (sourceImage.getHeight() - watermarkImage.getHeight()) / 2;
// paints the image watermark
g2d.drawImage(watermarkImage, topLeftX, topLeftY, null);
ImageIO.write(sourceImage, "png", destImageFile);
g2d.dispose();
System.out.println("The image watermark is added to the image.");
} catch (IOException ex) {
System.err.println(ex);
}
}
http://www.codejava.net/java-se/graphics/adding-a-watermark-over-an-image-programmatically-using-java

How to resize JLabel ImageIcon?

I'm making a Java Swing application that has the following layout (MigLayout):
[icon][icon][icon][....]
where icon = jlabel and the user can add more icons
When the user adds or removes icons, the others should shrink or grow.
My question is really straightforward: I have a JLabel which contains an ImageIcon; how can I resize this icon?

Try this :
ImageIcon imageIcon = new ImageIcon("./img/imageName.png"); // load the image to a imageIcon
Image image = imageIcon.getImage(); // transform it
Image newimg = image.getScaledInstance(120, 120, java.awt.Image.SCALE_SMOOTH); // scale it the smooth way
imageIcon = new ImageIcon(newimg); // transform it back
(found it here)

Resizing the icon is not straightforward. You need to use Java's graphics 2D to scale the image. The first parameter is a Image class which you can easily get from ImageIcon class. You can use ImageIcon class to load your image file and then simply call getter method to get the image.
private Image getScaledImage(Image srcImg, int w, int h){
BufferedImage resizedImg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = resizedImg.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(srcImg, 0, 0, w, h, null);
g2.dispose();
return resizedImg;
}

And what about it?:
ImageIcon imageIcon = new ImageIcon(new ImageIcon("icon.png").getImage().getScaledInstance(20, 20, Image.SCALE_DEFAULT));
label.setIcon(imageIcon);
From: Resize a picture to fit a JLabel

This will keep the right aspect ratio.
public ImageIcon scaleImage(ImageIcon icon, int w, int h)
{
int nw = icon.getIconWidth();
int nh = icon.getIconHeight();
if(icon.getIconWidth() > w)
{
nw = w;
nh = (nw * icon.getIconHeight()) / icon.getIconWidth();
}
if(nh > h)
{
nh = h;
nw = (icon.getIconWidth() * nh) / icon.getIconHeight();
}
return new ImageIcon(icon.getImage().getScaledInstance(nw, nh, Image.SCALE_DEFAULT));
}

One (quick & dirty) way to resize images it to use HTML & specify the new size in the image element. This even works for animated images with transparency.

I agree this code works, to size an ImageIcon from a file for display while keeping the aspect ratio I have used the below.
/*
* source File of image, maxHeight pixels of height available, maxWidth pixels of width available
* #return an ImageIcon for adding to a label
*/
public ImageIcon rescaleImage(File source,int maxHeight, int maxWidth)
{
int newHeight = 0, newWidth = 0; // Variables for the new height and width
int priorHeight = 0, priorWidth = 0;
BufferedImage image = null;
ImageIcon sizeImage;
try {
image = ImageIO.read(source); // get the image
} catch (Exception e) {
e.printStackTrace();
System.out.println("Picture upload attempted & failed");
}
sizeImage = new ImageIcon(image);
if(sizeImage != null)
{
priorHeight = sizeImage.getIconHeight();
priorWidth = sizeImage.getIconWidth();
}
// Calculate the correct new height and width
if((float)priorHeight/(float)priorWidth > (float)maxHeight/(float)maxWidth)
{
newHeight = maxHeight;
newWidth = (int)(((float)priorWidth/(float)priorHeight)*(float)newHeight);
}
else
{
newWidth = maxWidth;
newHeight = (int)(((float)priorHeight/(float)priorWidth)*(float)newWidth);
}
// Resize the image
// 1. Create a new Buffered Image and Graphic2D object
BufferedImage resizedImg = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = resizedImg.createGraphics();
// 2. Use the Graphic object to draw a new image to the image in the buffer
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(image, 0, 0, newWidth, newHeight, null);
g2.dispose();
// 3. Convert the buffered image into an ImageIcon for return
return (new ImageIcon(resizedImg));
}

I found that there is a minor edit to this fix from trolologuy on the last line of code, you will need to implement a new ImageIcon to get the code to compile properly (Yes I know this is 10 years ago). I found this to be an easy fix for a one off issue, but Suken Shah and Mr. Polywhirl have a better fix overall.
ImageIcon imageIcon = new ImageIcon("./img/imageName.png"); // assign image to a new ImageIcon
Image image = imageIcon.getImage(); // transform it
Image newimg = image.getScaledInstance(120, 120, java.awt.Image.SCALE_SMOOTH); // scale it smoothly
ImageIcon newImageIcon = new ImageIcon(newimg); // assign to a new ImageIcon instance

resize jpeg image in java

i am working on image comparison in java. I think before going to compare the images, it is better to process the images for setting a fixed size image. Is there any java functionality to resize the images. I want to rescale the images to 300*225.

BufferedImage img = ImageIO.read(imageFile);
Image scaled = img.getScaledInstance(300, 255, Image.SCALE_DEFAULT);
You can also take a look at the java-image-scaling library.

public ImageIcon resizeImage(String filePath, int w, int h) {
String data = filePath;
BufferedImage bsrc, bdest;
ImageIcon theIcon;
//scale the image
try
{
bsrc = ImageIO.read(new File(data));
bdest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bdest.createGraphics();
AffineTransform at = AffineTransform.getScaleInstance((double) w / bsrc.getWidth(),
(double) h / bsrc.getHeight());
g.drawRenderedImage(bsrc, at);
//add the scaled image
theIcon = new ImageIcon(bdest);
return theIcon;
}
catch (Exception e)
{
System.out.println("This image can not be resized. Please check the path and type of file.");
return null;
}
}

BufferedImage createResizedCopy(Image originalImage,
int scaledWidth, int scaledHeight,
boolean preserveAlpha)
{
int imageType = preserveAlpha ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
BufferedImage scaledBI = new BufferedImage(scaledWidth, scaledHeight, imageType);
Graphics2D g = scaledBI.createGraphics();
if (preserveAlpha) {
g.setComposite(AlphaComposite.Src);
}
g.drawImage(originalImage, 0, 0, scaledWidth, scaledHeight, null);
g.dispose();
return scaledBI;
}
This threads answers your question well
Very interesting article on manipulating images