Java - Image Rotation
16,911
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);
Author by
liosha
Updated on June 15, 2022Comments
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liosha almost 2 years
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:
Result:
Can you please help me with this problem?
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obataku over 11 yearsI feel ashamed for not immediately thinking of this... :-p
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java_xof over 11 yearswas late for a minute ... well :P