Package net.sourceforge.jiu.filters

Class OilFilter

  • public class OilFilter
extends AreaFilterOperation
    Applies a filter that makes the image look like an oil painting. This is accomplished by creating a histogram of the neighboring samples for each input sample and storing the value that occurs most often in the output image. If two or more samples occur an equal number of times, the lowest sample value is picked.

    Supported image types

    Can process both GrayIntegerImage and RGBIntegerImage. Note that this operation becomes very slow with 16 bits per sample because a lot of runs over a 65536 element array are necessary.

    Usage example

     PixelImage image = ...; // some GrayIntegerImage or RGBIntegerImage
 OilFilter filter = new OilFilter();
 filter.setArea(5, 5);
 filter.setInputImage(image);
 filter.process();
 PixelImage filteredImage = filter.getOutputImage();

    Credits

    Idea taken from the Oil class of Jef Poskanzer's ACME package.
    Author:
    Marco Schmidt

    • Field Detail

      • hist

        private int[] hist

      • zeroes

        private int[] zeroes

    • Constructor Detail

      • OilFilter

        public OilFilter()

    • Method Detail

      • computeSample

        public final int computeSample​(int[] samples,
                               int numSamples)
        Description copied from class: AreaFilterOperation
        Determine the resulting sample for an array with the source sample and zero or more of its neighbors. This abstract method must be implemented by classes extending this operation. The array will hold numSamples samples, which will be stored starting at offset 0.

        Normally, numSamples is equal to AreaFilterOperation.getAreaWidth() times AreaFilterOperation.getAreaHeight(). Near the border of the image you may get less samples. Example: the top left sample of an image has only three neighbors (east, south-east and south), so you will only get four samples (three neighbors and the sample itself).

        Specified by:
        computeSample in class AreaFilterOperation
        Parameters:
        samples - the array holding the sample(s)
        numSamples - number of samples in the array
        Returns:
        sample to be written to the output image