PaletteMiningMethod

Inheritance: java.lang.Object, com.aspose.ms.System.ValueType, com.aspose.ms.System.Enum

public final class PaletteMiningMethod extends System.Enum

The image palette mining method

Fields

Field	Description
UseCurrentPalette	Use exisiting palette of the image
ColorClustering	The color clustering method
Histogram	The histogram method

Example: The following example shows how to compress a PNG image, using indexed color with best fit palette

// Loads png image        
String sourceFilePath = "OriginalRings.png";
String outputFilePath = "OriginalRingsOutput.png";
try (com.aspose.imaging.Image image = com.aspose.imaging.Image.load(sourceFilePath))
{
    com.aspose.imaging.imageoptions.PngOptions options = new com.aspose.imaging.imageoptions.PngOptions();
    options.setProgressive(true);
    // Use indexed color type
    options.setColorType(com.aspose.imaging.fileformats.png.PngColorType.IndexedColor);
    // Use maximal compression
    options.setCompressionLevel(9);
    // Get the closest 8-bit color palette which covers as many pixels as possible, so that a palettized image
    // is almost visually indistinguishable from a non-palletized one.
    options.setPalette(com.aspose.imaging.ColorPaletteHelper.getCloseImagePalette((com.aspose.imaging.RasterImage)image, 
                                256, Aspose.Imaging.PaletteMiningMethod.Histogram));
                     
    image.save(outputFilePath, options);
}
// The output file size should be significantly reduced

UseCurrentPalette

public static final int UseCurrentPalette

Use exisiting palette of the image

ColorClustering

public static final int ColorClustering

The color clustering method

Histogram

public static final int Histogram

The histogram method