CODEWITHSUNDEEP
javaimagegraphicsrotationbufferedimage
liosha
liosha

Reputation: 103

Java - Image Rotation

I am trying to rotate image. I am using this Java code:

BufferedImage oldImage = ImageIO.read(new FileInputStream("C:\\workspace\\test\\src\\10.JPG"));
BufferedImage newImage = new BufferedImage(oldImage.getHeight(), oldImage.getWidth(), oldImage.getType());
Graphics2D graphics = (Graphics2D) newImage.getGraphics();
graphics.rotate(Math.toRadians(90), newImage.getWidth() / 2, newImage.getHeight() / 2);
graphics.drawImage(oldImage, 0, 0, oldImage.getWidth(), oldImage.getHeight(), null);
ImageIO.write(newImage, "JPG", new FileOutputStream("C:\\workspace\\test\\src\\10_.JPG"));

But I see strange result:

Source:

**Sourse image:**

Result:

**Result image:**

Can you please help me with this problem?

Upvotes: 10

Views: 17038

Answers (4)

Bahramdun Adil
Bahramdun Adil

Reputation: 6079

You can write like this it will be work.

BufferedImage newImage = new BufferedImage(oldImage.getWidth(), oldImage.getHeight(), oldImage.getType());

I think the place for width and height is wrong in your code.

Upvotes: 0

java_xof
java_xof

Reputation: 439

Try getting bounds of your panel on which you do your drawing

Rectangle rect = this.getBounds();

And then do: 

graphics.rotate(Math.toRadians(90), (rect.width - newImage.getWidth()) / 2, (rect.height - newImage.getHeight()) / 2);

Hope that could help Cheers!

Upvotes: 0

Dan D.
Dan D.

Reputation: 32391

It is not enough to switch the width and height of the image. You are rotating using the center of the image as the origin of rotation. Just try the same with a sheet of paper and you will see it works the same way. You must also move the paper a little bit, which means to apply a transform to fix this. So, immediately after the rotate call, do this:

  graphics.translate((newImage.getWidth() - oldImage.getWidth()) / 2, (newImage.getHeight() - oldImage.getHeight()) / 2);

Upvotes: 14

user1631214
user1631214

Reputation:

The new image has different sizes because of the rotate. try this: BufferedImage newImage = new BufferedImage( oldImage.getWidth(),oldImage.getHeight(),oldImage.getType());

Upvotes: 0

Related Questions