Example Image Blur

• 

  Input image

• 

  Gaussian Filter

• 

  Mean Filter

• 

  Median Filter

Applying different types of image blur is a common way to "remove" noise from images and make later steps more effective. This example shows you how to apply different image blur operators using different interfaces.

Example Code:

• ExampleImageBlur.java

Concepts:

• Image Processing
• Filtering

Related Examples:

• Image Filter
• Convolutions

Example Code

/**
 * This example shows you can can apply different standard image blur filters to an input image using different
 * interface. For repeat calls using the filter interface has some advantages, but the procedural can be
 * simple to code up.
 *
 * @author Peter Abeles
 */
public class ExampleImageBlur {
	public static void main( String[] args ) {
		ListDisplayPanel panel = new ListDisplayPanel();
		BufferedImage buffered = UtilImageIO.loadImageNotNull(UtilIO.pathExample("standard/kodim17.jpg"));

		panel.addImage(buffered, "Original");

		Planar<GrayU8> input = ConvertBufferedImage.convertFrom(buffered, true, ImageType.pl(3, GrayU8.class));
		Planar<GrayU8> blurred = input.createSameShape();

		// size of the blur kernel. square region with a width of radius*2 + 1
		int radius = 8;

		// Apply gaussian blur using a procedural interface
		GBlurImageOps.gaussian(input, blurred, -1, radius, null);
		panel.addImage(ConvertBufferedImage.convertTo(blurred, null, true), "Gaussian");

		// Apply a mean filter using an object oriented interface. This has the advantage of automatically
		// recycling memory used in intermediate steps
		BlurFilter<Planar<GrayU8>> filterMean = FactoryBlurFilter.mean(input.getImageType(), radius);
		filterMean.process(input, blurred);
		panel.addImage(ConvertBufferedImage.convertTo(blurred, null, true), "Mean");

		// Apply a median filter using image type specific procedural interface. Won't work if the type
		// isn't known at compile time
		BlurImageOps.median(input, blurred, radius, radius, null);
		panel.addImage(ConvertBufferedImage.convertTo(blurred, null, true), "Median");

		ShowImages.showWindow(panel, "Image Blur Examples", true);
	}
}