Blurring an Image
You can also use Graphicizer to blur an image by clicking the Blur button. You can see the results in Figure 3.7, where the image has an out-of-focus look.
Figure 3.7. Blurring an image.
To blur an image, the code will simply combine the pixels surrounding a particular pixel. Here's what this looks like using a Kernel object and a ConvolveOp object:
if(event.getSource() == button4){
bufferedImageBackup = bufferedImage;
Kernel kernel = new Kernel(3, 3, new float[]
{.25f, 0, .25f,
0, 0, 0,
.25f, 0, .25f});
ConvolveOp convolveOp = new ConvolveOp(kernel);
BufferedImage temp = new BufferedImage(
bufferedImage.getWidth(), bufferedImage.getHeight(),
BufferedImage.TYPE_INT_ARGB);
convolveOp.filter(bufferedImage, temp);
bufferedImage = temp;
repaint();
}
And that's all it takes—now you can blur images just by clicking the Blur button.
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